错误：无法将类型为“System.Web.UI.WebControls.TextBox”的对象强制转换为“System.Web.UI.WebControls.Label” [英] error:Unable to cast object of type 'System.Web.UI.WebControls.TextBox' to type 'System.Web.UI.WebControls.Label'

问题描述

<％@ Page Title =Language =C＃MasterPageFile =〜/ SA_MASTER_reports.masterAutoEventWireup =trueCodeFile =Default.aspx.csInherits =_ Default％>



< asp：Content ID =Content1ContentPlaceHolderID =headRunat =Server>

< style type = text / css>

.style1

{

身高：25px;

}

< / style>



< asp：Content ID =Content2ContentPlaceHolderID =ContentPlaceHolder1Runat =Server>



style =border：medium groove＃000000>

style =color：＃0000FF; f ont-weight：粗体> < asp：Label ID =Lblerrrunat =serverText =Label> < asp：标签ID =Labelerr1runat =serverText =Label>
style =color： ＃0000FF; font-weight：bold> < asp：Label ID =Label8runat =serverText =State Code>	style =color：＃0000FF; font-weight：bold> < asp：Label ID =Strunat =serverText =Label>
style =color：＃0000FF; font-weight：bold> < asp：Label ID =Label10runat =serverText =District>	style =color：＃0000FF; font-weight：bold> < asp：Label ID =Dirunat =serverText =Label>
style =color：＃0000FF; font-weight：bold> < asp：Label ID =Label12runat =serverText =Panchayat Name>	style =color：＃0000FF; font-weight：bold> < asp：Label ID =Panrunat =serverText =Label>
style =color：＃0000FF; font-weight：boldclass =style1> < asp：Label ID =Label14runat =serverText =Panchayat Code >	style =color：＃0000FF; font-weight：boldclass =style1> < asp：Label ID =Pacrunat =serverText =Label>
style =color：＃0000FF; font-weight：bold> < asp：Label ID =Label16runat =serverText =From>	style =color：＃0000FF; font-weight：bold> < asp：Label ID =Frrunat =serverText =Label>
style =color：＃0000FF; font-weight：bold> < asp：Label ID =Label18runat =serverText =至>	style =color：＃0000FF; font-weight：bold> < asp：Label ID =Torunat =serverText =标签>

style =border：medium groove＃000000>

style =color：＃0000FF; font-weight：bold> < asp：GridView ID =GridView1runat =serverBackColor =WhiteBorderColor =＃999999 BorderStyle =NoneBorderWidth =1pxCellPadding =3AutoGenerateColumns =False ShowFooter =TrueOnRowCancelingEdit =GridView1_RowCancelingEdit OnRowEditing =GridView1_RowEditing Width =83％AllowPaging =True onpageindexchanging =GridView1_PageIndexChangingPageSize =5 GridLines =Vertical onrowupdating =GridView1_RowUpdating > < alternatingrowstyle backcolor =＃DCDCDC> < columns>< asp ：TemplateField HeaderText =S NOHeaderStyle-BackColor =& gt; < itemtemplate> < asp：Label ID =snorunat =serverText ='< ％＃Eval（s_no）％>'> < asp：TemplateField HeaderText =头部名称HOUSEHOLD> < itemtemplate> < asp：Label ID =Nmerunat =serverText =' <％＃Eval（Nme_of_head_hh）％>'> < asp：TemplateField HeaderText =NO OF提供的工作日> < itemtemplate> < asp：Label ID =Norunat =serverText ='<％＃Eval（No_of_days_provided）％>'> < asp：TemplateField HeaderText =没有提供任何工作但是没有提供> < itemtemplate> < asp：Label ID =Notrunat =serverText ='<％＃Eval（No_of_days_nt_provided）％>'> ; < asp：TemplateField HeaderText =个人工作名称> < itemtemplate> < asp：Label ID =Noirunat =serverText ='<％＃Eval（Name_of_indi_sanc）％>'> < asp：TemplateField HeaderText =JOB CARDNUMBERHeaderStyle-BackColor =Green> < edititemtemplate> < asp：TextBox ID =Jc1runat =serverText ='<％＃Eval（Job_card）％>'> < itemtemplate> < asp：Label ID =Jcrunat =serverText ='<％＃Eval（Job_card）％>'> < HeaderStyle BackColor =Green>< / HeaderStyle> < asp：TemplateField HeaderText =通过社交审核填写的UNREGISTER DEMANDHeaderStyle-BackColor =Green> < edititemtemplate> < asp： TextBox ID =UDrunat =serverText ='<％＃Eval（Unregister_demand_to_be）％>'> < itemtemplate> < asp：Label ID =udtrunat =serverText ='<％＃Eval（Unregister_demand_to_be）％>'> < HeaderStyle BackColor =Green>< / HeaderStyle> < asp ：TemplateField HeaderText =个人工作所需但尚未制裁HeaderStyle-BackColor =Green> & lt; edititemtemplate> < asp：TextBox ID =iwtrunat =serverText ='<％＃Eval（Individual_work_req）％>'> < itemtemplate> < asp：Label ID =IWrunat =serverText ='<％＃Eval（Individual_work_req ）％>'> < HeaderStyle BackColor =Green>< / HeaderStyle> < asp：TemplateField HeaderText =SC ST其他未被标记为SC ST其他易受伤害的群体，因此在MIS上HeaderStyle-BackColor =Green> < edititemtemplate> < asp：TextBox ID =sctrunat =serverText ='<％＃Eval（Sc_st_other）％> > < itemtemplate> < asp：Label ID =SCrunat =serverText ='< ％＃Eval（Sc_st_other）％>'> < HeaderStyle BackColor =Green>< / HeaderStyle> < asp：CommandField ShowEditButton =True/> < footerstyle backcolor =＃CCCCCCforecolor =黑色> < HeaderStyle BackColor =＃000084Font-Bold =TrueForeColor =白色/> < pagerstyle backcolor =＃999999forecolor =黑色horizo​​ntalalign =中心> < rowstyle backcolor =＃EEEEEEforecolor =黑色> < SelectedRowStyle BackColor =＃008A8CFont-Bold =TrueForeColor =White/> < sortedascendingcellstyle backcolor =＃F1F1F1> < sortedascendingheaderstyle backcolor =＃0000A9> < sorteddescendingcellstyle backcolor =＃CAC9C9> < sorteddescendingheaderstyle backcolor =＃000065> < asp：SqlDataSource ID =SqlDataSource1runat =server ConnectionString = <％$ ConnectionStrings：hhConnectionString％> SelectCommand =SELECT * FROM [nrega111]>

使用System;

使用System.Collections.Generic;

使用System.Linq;

使用System.Web;

使用System.Web.UI;

使用System.Web.UI.WebControls;

使用System.Data;

使用System.Data.SqlClient;

使用System.Configuration;



public partial class _Default：System.Web.UI。页面

{

String district_name =;

String state_name =;

String panchayat_name = ;

String panchayat_code =;

String from_dt =;

String To_dt =;

public String state_code =;



DataTable dtt;

SqlConnection con = new SqlConnection（）;



protected void Page_Load（object sender，EventArgs e）

{

Labelerr1.Text =;

Lblerr.Text =;

district_name = Con vert.ToString（Session [district_name2]）;

state_code = Convert.ToString（Session [state_code_d2]）;

panchayat_name = Convert.ToString（Session [ panchayat_name2]）;

from_dt = Convert.ToString（Session [from_dt2]）;

To_dt = Convert.ToString（Session [to_dt2]）;

panchayat_code = Convert.ToString（Session [panchayat_code2]）; ;









if（！Page.IsPostBack）

{

St.Text = state_name;

Di.Text = district_name;

Pan.Text = panchayat_name;

Pac.Text = panchayat_code;

Fr.Text = from_dt;

To.Text = To_dt;



DataTable ff = new DataTable（）;

ff = binddatasc（）;

GridView1.DataSource = ff;

GridView1.DataBind（）;







}











}





public DataTable binddatasc（）

{

con.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings [hhConnectionString ] .ConnectionString;

SqlCommand cmd = new SqlCommand（）;

cmd.Connection = con;

cmd.CommandText =select * from nrega111;

SqlDataAdapter adp = new SqlDataAdapter（cmd）;

DataTable dt = new DataTable（）;

adp.Fill（dt）;

return dt;









}





protected void GridView1_RowCancelingEdit（object sender，GridViewCancelEditEventArgs e）

{

try

{

GridView1.EditIndex = -1;

dtt = binddatasc（）;

if（dtt.Rows.Count == 0）

{

GridView1.Visible = false;

}

else

{

GridView1.Visible = true;

}

GridView1.DataSource = d tt;

GridView1.DataBind（）;



}



catch （例外情况）

{



Labelerr1.Text =错误：+ ex.Message;





}

}







protected void GridView1_RowEditing（object sender，GridViewEditEventArgs e）

{

try

{



foreach（GridView1.Rows中的GridViewRow行）

{



GridView1.EditIndex = e .NewEditIndex;



}

dtt = binddatasc（）;

GridView1.DataSource = dtt;

GridView1.DataBind（）;









}

catch（例外情况）

{

Labelerr1.Text =错误：+ ex.Message;

}

}

protected void GridView1_PageIndexChanging（object sender，GridViewPageEventArgs e）

{

GridView1.PageIndex = e.NewPageIndex;

dtt = binddatasc（）;

GridView1.DataSource = dtt;

GridView1.DataBind（）;

}

protected void GridView1_RowUpdating（object sender，GridViewUpdateEventArgs e）

{

试试

{

if（Page.IsValid）

{

socialAudit_BL vv = new socialAudit_BL（）;

SocialAudit_BE tt = new SocialAudit_BE（）;



标签Jc =（标签）GridView1。行[e.RowIndex] .FindControl（Jc）;

标签udt =（标签）GridView1.Rows [e.RowIndex] .FindControl（UD）;

标签IW =（Label）GridView1.Rows [e.RowIndex] .FindControl（IW）;

Label SC =（Label）GridView1.Rows [e.RowIndex] .FindControl（SC）;

TextBox Jc1 =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（Jc1）;

TextBox UD =（TextBox）GridView1.Rows [e。 RowIndex] .FindControl（udt）;

TextBox iwt =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（iwt）;

TextBox sct =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（sct）;



tt.jobc_no = Jc1.Text;

tt.Unregs_deman_to_be_fill = udt.Text;

tt.Indi_work_desire_nt_sanstioned = sct.Text;

tt.Sc_st_other_whois_nt_tagg = sct.Text;

tt.state_code = St.Text;

tt.district_name = Di.Text;

tt.panchayat = Pan.Text;

tt.panchayat_code = Pac.Text;

tt.dt_from = Convert.ToDateTime（Fr.Text）;

tt.dt_To = Convert.ToDateTime（To.Text）;

socialAudit_BL audit11 = new socialAudit_BL（）;

audit11.updategrid1（tt，GridView1.DataKeys [e.RowIndex] .Values [0] .ToString（））;

Labelerr1.ForeColor = System.Drawing.Color.Green;

Labelerr1.Text =提交记录;

















}

}



catch（例外情况）

{

Labelerr1.Text =错误：+ ex.Message;



}



终于

{

con.Close（）;

}





}

}

解决方案

ConnectionStrings：hhConnectionString％>

SelectCommand =SELECT * FROM [nrega111]>



















使用系统;

使用System.Collections.Generic;

使用System.Linq;

使用System.Web;

使用System.Web。 UI;

使用System.Web.UI.WebControls;

使用System.Data;

使用System.Data.SqlClient;

使用System.Configuration;



public partial class _Default：System.Web.UI.Page

{

String district_name =;

String state_name =;

String panchayat_name =;

String panchayat_code = ;

String from_dt =;

String To_dt = ;

public String state_code =;



DataTable dtt;

SqlConnection con = new SqlConnection （）;



protected void Page_Load（object sender，EventArgs e）

{

Labelerr1.Text = ;

Lblerr.Text =;

district_name = Convert.ToString（Session [district_name2]）;

state_code = Convert.ToString（Session [state_code_d2]）;

panchayat_name = Convert.ToString（Session [panchayat_name2]）;

from_dt = Convert.ToString（Session [ from_dt2]）;

To_dt = Convert.ToString（Session [to_dt2]）;

panchayat_code = Convert.ToString（Session [panchayat_code2]）; ;









if（！Page.IsPostBack）

{

St.Text = state_name;

Di.Text = district_name;

Pan.Text = panchayat_name;

Pac.Text = panchayat_code;

Fr.Text = from_dt;

To.Text = To_dt;



DataTable ff = new DataTable（）;

ff = binddatasc（）;

GridView1.DataSource = ff;

GridView1.DataBind（）;







}











}





public DataTable binddatasc（）

{

con.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings [hhConnectionString ] .ConnectionString;

SqlCommand cmd = new SqlCommand（）;

cmd.Connection = con;

cmd.CommandText =select * from nrega111;

SqlDataAdapter adp = new SqlDataAdapter（cmd）;

DataTable dt = new DataTable（）;

adp.Fill（dt）;

return dt;









}





protected void GridView1_RowCancelingEdit（object sender，GridViewCancelEditEventArgs e）

{

try

{

GridView1.EditIndex = -1;

dtt = binddatasc（）;

if（dtt.Rows.Count == 0）

{

GridView1.Visible = false;

}

else

{

GridView1.Visible = true;

}

GridView1.DataSource = d tt;

GridView1.DataBind（）;



}



catch （例外情况）

{



Labelerr1.Text =错误：+ ex.Message;





}

}







protected void GridView1_RowEditing（object sender，GridViewEditEventArgs e）

{

try

{



foreach（GridView1.Rows中的GridViewRow行）

{



GridView1.EditIndex = e .NewEditIndex;



}

dtt = binddatasc（）;

GridView1.DataSource = dtt;

GridView1.DataBind（）;









}

catch（例外情况）

{

Labelerr1.Text =错误：+ ex.Message;

}

}

protected void GridView1_PageIndexChanging（object sender，GridViewPageEventArgs e）

{

GridView1.PageIndex = e.NewPageIndex;

dtt = binddatasc（）;

GridView1.DataSource = dtt;

GridView1.DataBind（）;

}

protected void GridView1_RowUpdating（object sender，GridViewUpdateEventArgs e）

{

试试

{

if（Page.IsValid）

{

socialAudit_BL vv = new socialAudit_BL（）;

SocialAudit_BE tt = new SocialAudit_BE（）;



标签Jc =（标签）GridView1。行[e.RowIndex] .FindControl（Jc）;

标签udt =（标签）GridView1.Rows [e.RowIndex] .FindControl（UD）;

标签IW =（Label）GridView1.Rows [e.RowIndex] .FindControl（IW）;

Label SC =（Label）GridView1.Rows [e.RowIndex] .FindControl（SC）;

TextBox Jc1 =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（Jc1）;

TextBox UD =（TextBox）GridView1.Rows [e。 RowIndex] .FindControl（udt）;

TextBox iwt =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（iwt）;

TextBox sct =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（sct）;



tt.jobc_no = Jc1.Text;

tt.Unregs_deman_to_be_fill = udt.Text;

tt.Indi_work_desire_nt_sanstioned = sct.Text;

tt.Sc_st_other_whois_nt_tagg = sct.Text;

tt.state_code = St.Text;

tt.district_name = Di.Text;

tt.panchayat = Pan.Text;

tt.panchayat_code = Pac.Text;

tt.dt_from = Convert.ToDateTime（Fr.Text）;

tt.dt_To = Convert.ToDateTime（To.Text）;

socialAudit_BL audit11 = new socialAudit_BL（）;

audit11.updategrid1（tt，GridView1.DataKeys [e.RowIndex] .Values [0] .ToString（））;

Labelerr1.ForeColor = System.Drawing.Color.Green;

Labelerr1.Text =提交记录;

















}

}



catch（例外情况）

{

Labelerr1.Text =错误：+ ex.Message;



}



终于

{

con.Close（）;

}





}

}

Quote：

'System.Web.UI.WebControls.TextBox'to type' System.Web.UI.WebControls.Label'

因此，您正在将标签转换为 TextBox 。



逐行调试，找出你看到这个异常的确切位置。然后你可以实际更新那行代码。

 Label Jc =（Label）GridView1.Rows [e.RowIndex] .FindControl（  Jc）; 
  //   UD是一个文本框，无法将其转换为标签 
 < span class =code-comment> //  < asp：textbox id =UDrunat =servertext =<％＃Eval（ Unregister_demand_to_be）％> xmlns：asp =＃unknown>  
  //  标签udt =（标签） GridView1.Rows [e.RowIndex] .FindControl（UD）;  
  //  更正的代码 
标签udt =（标签）GridView1.Rows [e.RowIndex] .FindControl（  UDT）; 
 
标签IW =（标签）GridView1.Rows [e.RowIndex] .FindControl（  IW）; 
标签SC =（标签）GridView1.Rows [e.RowIndex] .FindControl（  SC）; 
 TextBox Jc1 =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（  Jc1）; 
  //   udt是一个无法将其转换为文本框的标签 
 
  //   TextBox UD =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（udt） ;  
  //  更正后的代码 
 TextBox UD =（TextBox ）GridView1.Rows [e.RowIndex] .FindControl（  UD）; 
 
 TextBox iwt =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（  IWT）; 
 TextBox sct =（TextBox）GridView1.Rows [e.RowIndex] .FindControl（  sct）; 

<%@ Page Title="" Language="C#" MasterPageFile="~/SA_MASTER_reports.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
<style type="text/css">
.style1
{
height: 25px;
}
</style>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

style="border: medium groove #000000">

style="color: #0000FF; font-weight: bold" > <asp:Label ID="Lblerr" runat="server" Text="Label"> <asp:Label ID="Labelerr1" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" > <asp:Label ID="Label8" runat="server" Text="State Code">	style="color: #0000FF; font-weight: bold" > <asp:Label ID="St" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" > <asp:Label ID="Label10" runat="server" Text="District">	style="color: #0000FF; font-weight: bold" > <asp:Label ID="Di" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" > <asp:Label ID="Label12" runat="server" Text="Panchayat Name">	style="color: #0000FF; font-weight: bold" > <asp:Label ID="Pan" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" class="style1" > <asp:Label ID="Label14" runat="server" Text="Panchayat Code">	style="color: #0000FF; font-weight: bold" class="style1" > <asp:Label ID="Pac" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" > <asp:Label ID="Label16" runat="server" Text="From">	style="color: #0000FF; font-weight: bold" > <asp:Label ID="Fr" runat="server" Text="Label">
style="color: #0000FF; font-weight: bold" > <asp:Label ID="Label18" runat="server" Text="To">	style="color: #0000FF; font-weight: bold" > <asp:Label ID="To" runat="server" Text="Label">

style="border: medium groove #000000">

style="color: #0000FF; font-weight: bold" > <asp:GridView ID="GridView1" runat="server" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" CellPadding="3" AutoGenerateColumns="False" ShowFooter="True" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowEditing="GridView1_RowEditing" Width="83%" AllowPaging="True" onpageindexchanging="GridView1_PageIndexChanging" PageSize="5" GridLines="Vertical" onrowupdating="GridView1_RowUpdating" > <alternatingrowstyle backcolor="#DCDCDC"> <columns> <asp:TemplateField HeaderText="S NO" HeaderStyle-BackColor=> <itemtemplate> <asp:Label ID="sno" runat="server" Text='<%#Eval("s_no") %>'> <asp:TemplateField HeaderText="NAME OF HEAD OF HOUSEHOLD"> <itemtemplate> <asp:Label ID="Nme" runat="server" Text='<%#Eval("Nme_of_head_hh ") %>'> <asp:TemplateField HeaderText="NO OF DAYS OF WORK PROVIDED"> <itemtemplate> <asp:Label ID="No" runat="server" Text='<%#Eval(" No_of_days_provided") %>'> <asp:TemplateField HeaderText="NO OF DAYS WORK DEMANDED BUT NOT PROVIDED"> <itemtemplate> <asp:Label ID="Not" runat="server" Text='<%#Eval(" No_of_days_nt_provided") %>'> <asp:TemplateField HeaderText="NAME OF INDIVIDUAL WORK SANCTIONED"> <itemtemplate> <asp:Label ID="Noi" runat="server" Text='<%#Eval("Name_of_indi_sanc") %>'> <asp:TemplateField HeaderText="JOB CARDNUMBER" HeaderStyle-BackColor ="Green"> <edititemtemplate> <asp:TextBox ID="Jc1" runat="server" Text='<%#Eval("Job_card") %>'> <itemtemplate> <asp:Label ID="Jc" runat="server" Text='<%#Eval("Job_card") %>'> <HeaderStyle BackColor="Green"></HeaderStyle> <asp:TemplateField HeaderText="UNREGISTER DEMAND TO BE FILLED BY SOCIAL AUDIT" HeaderStyle-BackColor ="Green"> <edititemtemplate> <asp:TextBox ID="UD" runat="server" Text='<%#Eval("Unregister_demand_to_be") %>'> <itemtemplate> <asp:Label ID="udt" runat="server" Text='<%#Eval("Unregister_demand_to_be") %>'> <HeaderStyle BackColor="Green"></HeaderStyle> <asp:TemplateField HeaderText="INDIVIDUAL WORK DESIRED BUT NOT SANCTIONED" HeaderStyle-BackColor ="Green"> <edititemtemplate> <asp:TextBox ID="iwt" runat="server" Text='<%#Eval("Individual_work_req") %>'> <itemtemplate> <asp:Label ID="IW" runat="server" Text='<%#Eval("Individual_work_req") %>'> <HeaderStyle BackColor="Green"></HeaderStyle> <asp:TemplateField HeaderText="SC ST OTHER WHO IS NOT TAGGED AS SC ST OTHER VULNERABLE GROUP AS SO ON THE MIS" HeaderStyle-BackColor ="Green"> <edititemtemplate> <asp:TextBox ID="sct" runat="server" Text='<%#Eval(" Sc_st_other") %>'> <itemtemplate> <asp:Label ID="SC" runat="server" Text='<%#Eval(" Sc_st_other") %>'> <HeaderStyle BackColor="Green"></HeaderStyle> <asp:CommandField ShowEditButton="True" /> <footerstyle backcolor="#CCCCCC" forecolor="Black"> <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" /> <pagerstyle backcolor="#999999" forecolor="Black" horizontalalign="Center"> <rowstyle backcolor="#EEEEEE" forecolor="Black"> <SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" /> <sortedascendingcellstyle backcolor="#F1F1F1"> <sortedascendingheaderstyle backcolor="#0000A9"> <sorteddescendingcellstyle backcolor="#CAC9C9"> <sorteddescendingheaderstyle backcolor="#000065"> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:hhConnectionString %>" SelectCommand="SELECT * FROM [nrega111]">

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
String district_name = "";
String state_name = "";
String panchayat_name = "";
String panchayat_code = "";
String from_dt = "";
String To_dt = "";
public String state_code = "";

DataTable dtt;
SqlConnection con = new SqlConnection();

protected void Page_Load(object sender, EventArgs e)
{
Labelerr1.Text = "";
Lblerr.Text = "";
district_name = Convert.ToString(Session["district_name2"]);
state_code = Convert.ToString(Session["state_code_d2"]);
panchayat_name = Convert.ToString(Session["panchayat_name2"]);
from_dt = Convert.ToString(Session["from_dt2"]);
To_dt = Convert.ToString(Session["to_dt2"]);
panchayat_code = Convert.ToString(Session["panchayat_code2"]); ;




if (!Page.IsPostBack)
{
St.Text = state_name;
Di.Text = district_name;
Pan.Text = panchayat_name;
Pac.Text = panchayat_code;
Fr.Text = from_dt;
To.Text = To_dt;

DataTable ff = new DataTable();
ff = binddatasc();
GridView1.DataSource = ff;
GridView1.DataBind();



}





}


public DataTable binddatasc()
{
con.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["hhConnectionString"].ConnectionString;
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "select * from nrega111";
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
adp.Fill(dt);
return dt;




}


protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
try
{
GridView1.EditIndex = -1;
dtt = binddatasc();
if (dtt.Rows.Count == 0)
{
GridView1.Visible = false;
}
else
{
GridView1.Visible = true;
}
GridView1.DataSource = dtt;
GridView1.DataBind();

}

catch (Exception ex)
{

Labelerr1.Text = "Error :" + ex.Message;


}
}



protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
try
{

foreach (GridViewRow row in GridView1.Rows)
{

GridView1.EditIndex = e.NewEditIndex;

}
dtt = binddatasc();
GridView1.DataSource = dtt;
GridView1.DataBind();




}
catch (Exception ex)
{
Labelerr1.Text = "Error : " + ex.Message;
}
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
dtt = binddatasc();
GridView1.DataSource = dtt;
GridView1.DataBind();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
try
{
if (Page.IsValid)
{
socialAudit_BL vv = new socialAudit_BL();
SocialAudit_BE tt = new SocialAudit_BE();

Label Jc = (Label)GridView1.Rows[e.RowIndex].FindControl("Jc");
Label udt = (Label)GridView1.Rows[e.RowIndex].FindControl("UD");
Label IW = (Label)GridView1.Rows[e.RowIndex].FindControl("IW");
Label SC = (Label)GridView1.Rows[e.RowIndex].FindControl("SC");
TextBox Jc1 = (TextBox)GridView1.Rows[e.RowIndex].FindControl("Jc1");
TextBox UD = (TextBox)GridView1.Rows[e.RowIndex].FindControl("udt");
TextBox iwt = (TextBox)GridView1.Rows[e.RowIndex].FindControl("iwt");
TextBox sct = (TextBox)GridView1.Rows[e.RowIndex].FindControl("sct");

tt.jobc_no = Jc1.Text;
tt.Unregs_deman_to_be_fill = udt.Text;
tt.Indi_work_desire_nt_sanstioned = sct.Text;
tt.Sc_st_other_whois_nt_tagg = sct.Text;
tt.state_code = St.Text;
tt.district_name = Di.Text;
tt.panchayat = Pan.Text;
tt.panchayat_code = Pac.Text;
tt.dt_from = Convert.ToDateTime(Fr.Text);
tt.dt_To = Convert.ToDateTime(To.Text);
socialAudit_BL audit11 = new socialAudit_BL();
audit11.updategrid1(tt, GridView1.DataKeys[e.RowIndex].Values[0].ToString());
Labelerr1.ForeColor = System.Drawing.Color.Green;
Labelerr1.Text = "Record submitted";








}
}

catch (Exception ex)
{
Labelerr1.Text = "error:" + ex.Message;

}

finally
{
con.Close();
}


}
}

解决方案

ConnectionStrings:hhConnectionString %>"
SelectCommand="SELECT * FROM [nrega111]">









using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

public partial class _Default : System.Web.UI.Page
{
String district_name = "";
String state_name = "";
String panchayat_name = "";
String panchayat_code = "";
String from_dt = "";
String To_dt = "";
public String state_code = "";

DataTable dtt;
SqlConnection con = new SqlConnection();

protected void Page_Load(object sender, EventArgs e)
{
Labelerr1.Text = "";
Lblerr.Text = "";
district_name = Convert.ToString(Session["district_name2"]);
state_code = Convert.ToString(Session["state_code_d2"]);
panchayat_name = Convert.ToString(Session["panchayat_name2"]);
from_dt = Convert.ToString(Session["from_dt2"]);
To_dt = Convert.ToString(Session["to_dt2"]);
panchayat_code = Convert.ToString(Session["panchayat_code2"]); ;




if (!Page.IsPostBack)
{
St.Text = state_name;
Di.Text = district_name;
Pan.Text = panchayat_name;
Pac.Text = panchayat_code;
Fr.Text = from_dt;
To.Text = To_dt;

DataTable ff = new DataTable();
ff = binddatasc();
GridView1.DataSource = ff;
GridView1.DataBind();



}





}


public DataTable binddatasc()
{
con.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["hhConnectionString"].ConnectionString;
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "select * from nrega111";
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
adp.Fill(dt);
return dt;




}


protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
try
{
GridView1.EditIndex = -1;
dtt = binddatasc();
if (dtt.Rows.Count == 0)
{
GridView1.Visible = false;
}
else
{
GridView1.Visible = true;
}
GridView1.DataSource = dtt;
GridView1.DataBind();

}

catch (Exception ex)
{

Labelerr1.Text = "Error :" + ex.Message;


}
}



protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
try
{

foreach (GridViewRow row in GridView1.Rows)
{

GridView1.EditIndex = e.NewEditIndex;

}
dtt = binddatasc();
GridView1.DataSource = dtt;
GridView1.DataBind();




}
catch (Exception ex)
{
Labelerr1.Text = "Error : " + ex.Message;
}
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
dtt = binddatasc();
GridView1.DataSource = dtt;
GridView1.DataBind();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
try
{
if (Page.IsValid)
{
socialAudit_BL vv = new socialAudit_BL();
SocialAudit_BE tt = new SocialAudit_BE();

Label Jc = (Label)GridView1.Rows[e.RowIndex].FindControl("Jc");
Label udt = (Label)GridView1.Rows[e.RowIndex].FindControl("UD");
Label IW = (Label)GridView1.Rows[e.RowIndex].FindControl("IW");
Label SC = (Label)GridView1.Rows[e.RowIndex].FindControl("SC");
TextBox Jc1 = (TextBox)GridView1.Rows[e.RowIndex].FindControl("Jc1");
TextBox UD = (TextBox)GridView1.Rows[e.RowIndex].FindControl("udt");
TextBox iwt = (TextBox)GridView1.Rows[e.RowIndex].FindControl("iwt");
TextBox sct = (TextBox)GridView1.Rows[e.RowIndex].FindControl("sct");

tt.jobc_no = Jc1.Text;
tt.Unregs_deman_to_be_fill = udt.Text;
tt.Indi_work_desire_nt_sanstioned = sct.Text;
tt.Sc_st_other_whois_nt_tagg = sct.Text;
tt.state_code = St.Text;
tt.district_name = Di.Text;
tt.panchayat = Pan.Text;
tt.panchayat_code = Pac.Text;
tt.dt_from = Convert.ToDateTime(Fr.Text);
tt.dt_To = Convert.ToDateTime(To.Text);
socialAudit_BL audit11 = new socialAudit_BL();
audit11.updategrid1(tt, GridView1.DataKeys[e.RowIndex].Values[0].ToString());
Labelerr1.ForeColor = System.Drawing.Color.Green;
Labelerr1.Text = "Record submitted";








}
}

catch (Exception ex)
{
Labelerr1.Text = "error:" + ex.Message;

}

finally
{
con.Close();
}


}
}

Quote:

'System.Web.UI.WebControls.TextBox' to type 'System.Web.UI.WebControls.Label'

So, somewhere you are converting a Label to TextBox.

Debug line by line and find out where exactly you are seeing this exception. Then you can actually update that line of code.

Label Jc = (Label)GridView1.Rows[e.RowIndex].FindControl("Jc");
//UD is a textbox you can not convert it to label
//<asp:textbox id="UD" runat="server" text="<%#Eval("Unregister_demand_to_be") %>" xmlns:asp="#unknown">
//Label udt = (Label)GridView1.Rows[e.RowIndex].FindControl("UD");
//corrected code
Label udt = (Label)GridView1.Rows[e.RowIndex].FindControl("udt");

Label IW = (Label)GridView1.Rows[e.RowIndex].FindControl("IW");
Label SC = (Label)GridView1.Rows[e.RowIndex].FindControl("SC");
TextBox Jc1 = (TextBox)GridView1.Rows[e.RowIndex].FindControl("Jc1");
//udt is a label you can not convert it to textbox

//TextBox UD = (TextBox)GridView1.Rows[e.RowIndex].FindControl("udt");
//corrected code
TextBox UD = (TextBox)GridView1.Rows[e.RowIndex].FindControl("UD");

TextBox iwt = (TextBox)GridView1.Rows[e.RowIndex].FindControl("iwt");
TextBox sct = (TextBox)GridView1.Rows[e.RowIndex].FindControl("sct");

这篇关于错误：无法将类型为“System.Web.UI.WebControls.TextBox”的对象强制转换为“System.Web.UI.WebControls.Label”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！