更新网格视图的查询不起作用..代码正在执行但无法更新链接到gridview的数据表。 [英] update query for the gridview not working .. the code is executing but unable to update the datatable that is linked to the gridview.
本文介绍了更新网格视图的查询不起作用..代码正在执行但无法更新链接到gridview的数据表。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我提供了代码，它是一个运行代码唯一的问题，我无法找到为什么gridview不更新，即使查询是正确的。请帮我这个。
在aspx.cs文件中
i m providing with u the code it is a running code the only problem that i m unable to find out it why the gridview in not updating even though the query is correct. please help me on this.
in aspx.cs file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
namespace Cascadingmenu
{
public partial class _Default : System.Web.UI.Page
{
override protected void OnInit(EventArgs e)
{
box();
base.OnInit(e);
int count = Session.Count;
}
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection();
SqlCommand cmd = new SqlCommand();
if (!IsPostBack)
{
tech();
bind();
ddlspec.SelectedIndex = 0;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
int chkSpec = 0;
string yearOfExp = " ";
string lastUsed = "";
int k = Convert.ToInt32(Session["fill"]);
int i = 0;
for (; i < k; i++)
{
//CheckBox chk = new CheckBox();
CheckBox chk = (CheckBox)Panel2.FindControl("ch1" + i);
if (chk.Checked == true)
{
chkSpec = 1;
}
else
{
chkSpec = 0;
// cmd1.Parameters.Add("@ch1", SqlDbType.Bit).Value = 0;
}
TextBox txtYrOfExp = (TextBox)Panel2.FindControl("txt1" + i);
yearOfExp = txtYrOfExp.Text;
TextBox txtLstUsd = (TextBox)Panel2.FindControl("txt2" + i);
lastUsed = txtLstUsd.Text;
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
con.Open();
string query1 = "insert into detail1(text1,text2,text3,subjects,text5,text6,text7,text8)values('" + chkSpec + "','" + yearOfExp + "','" + lastUsed + "','" + ddltech.SelectedItem.Text + "','" + ddlspec.SelectedItem.Text + "','" + TextBox7.Text + "','" + TextBox8.Text + "','" + TextBox9.Text + "')";
SqlCommand cmd1 = new SqlCommand(query1, con);
int numrow1 = cmd1.ExecuteNonQuery();
con.Close();
}
Response.Redirect("default.aspx");
}
private void autofill(int specval)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select skill,techval from level where specval=@specval";
cmd.Parameters.AddWithValue("@specval", specval);
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
con.Open();
da.SelectCommand = cmd;
da.Fill(ds);
Session["ds"] = ds;
con.Close();
int i = ds.Tables[0].Rows.Count;
Session["fill"] = i;
box();
}
private void tech()
{
SqlConnection con = new SqlConnection();
//con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Desktop\WebApplication7\WebApplication7\WebApplication7\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select techval,subjects from tech";
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
con.Open();
da.SelectCommand = cmd;
da.Fill(ds);
con.Close();
if (ds.Tables[0].Rows.Count > 0)
{
ddltech.DataSource = ds.Tables[0];
ddltech.DataTextField = "subjects";
ddltech.DataValueField = "techval";
ddltech.DataBind();
ddltech.Items.Insert(0, "--choose--");
}
else
{
Label1.Text = "choose appropriate value";
Label1.Visible = true;
}
}
private void specs(int techval)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select specs , specval from specs where techval=@techval";
cmd.Parameters.AddWithValue("@techval", techval);
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter();
con.Open();
da.SelectCommand = cmd;
da.Fill(ds);
ddlspec.DataSource = ds;
ddlspec.DataTextField = "specs";
ddlspec.DataValueField = "specval";
ddlspec.DataBind();
ddlspec.Items.Insert(0, "--Select--");
con.Close();
}
public void box()
{
int i = 0;
int k = Panel2.Controls.Count;
DataSet ds1 = new DataSet();
if (Session["ds"] != null)
{
ds1 = (DataSet)Session["ds"];
if (Session["fill"] != null)
{
i = Convert.ToInt32(Session["fill"].ToString());
}
for (int j = 0; j < i; j++)
{
TableRow skillTable = new TableRow();
TableCell cell1 = new TableCell();
TableCell cell2 = new TableCell();
TableCell cell3 = new TableCell();
TableCell cell4 = new TableCell();
TableCell cell5 = new TableCell();
TableCell cell6 = new TableCell();
cell1.Text = ds1.Tables[0].Rows[j][0].ToString();
CheckBox ch1 = new CheckBox();
ch1.ID = "ch1" + j.ToString();
cell2.Controls.Add(ch1);
cell3.Text = "Year Of Exp";
TextBox txt1 = new TextBox();
txt1.ID = "txt1" + j.ToString();
cell4.Controls.Add(txt1);
cell5.Text = "Recently Used ";
TextBox txt2 = new TextBox();
txt2.ID = "txt2" + j.ToString();
cell6.Controls.Add(txt2);
skillTable.Cells.Add(cell1);
skillTable.Cells.Add(cell2);
skillTable.Cells.Add(cell3);
skillTable.Cells.Add(cell4);
skillTable.Cells.Add(cell5);
skillTable.Cells.Add(cell6);
Table1.Rows.Add(skillTable);
}
}
}
protected void ddltech_SelectedIndexChanged(object sender, EventArgs e)
{
int techval = Convert.ToInt32(ddltech.SelectedValue.ToString());
specs(techval);
Panel2.Controls.Clear();
}
protected void ddlspec_SelectedIndexChanged(object sender, EventArgs e)
{
int specs = Convert.ToInt32(ddlspec.SelectedValue.ToString());
autofill(specs);
Panel2.Visible = true;
ddlspec.SelectedIndex = 0;
}
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
}
private void bind()
{
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
con.Open();
SqlCommand cmd;
string query = "Select * from detail1";
cmd = new SqlCommand(query, con);
SqlDataAdapter sda = new SqlDataAdapter(query, con);
DataSet ds = new DataSet();
sda.Fill(ds);
con.Close();
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
bind();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
//int id = Convert.ToInt32(e.CommandArgument);
//if (e.CommandName == "Delete")
//{
// SqlConnection con = new SqlConnection();
// con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\documents\visual studio 2010\Projects\WebApplication7\WebApplication7\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
// con.Open();
// string query = "delete from detail1 where id=" + id.ToString();
// SqlCommand cmd = new SqlCommand(query, con);
// int numrow = cmd.ExecuteNonQuery();
// con.Close();
//}
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
int i;
GridView1.EditIndex = 0;
int rowindex = GridView1.EditIndex;
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString());
//GridView1.EditIndex = e.NewEditIndex;
string[] cellvalue = new string[10];
for (i = 0; i < 8; i++)
{
DataControlFieldCell cell = (DataControlFieldCell)GridView1.Rows[rowindex].Cells[i];
BoundField field = (BoundField)cell.ContainingField;
System.Collections.Specialized.OrderedDictionary dict = new System.Collections.Specialized.OrderedDictionary();
field.ExtractValuesFromCell(dict, cell, DataControlRowState.Edit, true);
cellvalue[i] = dict[cell.ContainingField.ToString()].ToString();
}
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\documents\visual studio 2010\Projects\WebApplication7\WebApplication7\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
con.Open();
string query = "update detail1 set text1='" + cellvalue[0] + "',text2='" + cellvalue[1] + "',text3='" + cellvalue[2] + "',subjects='" + cellvalue[3] + "',text5='" + cellvalue[4] + "',text6='" + cellvalue[5] + "',text7='" + cellvalue[6] + "',text8='" + cellvalue[7] + "' where id=" + id.ToString();
SqlCommand cmd = new SqlCommand(query, con);
int numrow = cmd.ExecuteNonQuery();
con.Close();
con.Dispose();
bind();
// Response.Redirect("default.aspx");
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView1.EditIndex = -1;
bind();
}
protected void GridView1_DataBound(object sender, EventArgs e)
{
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//if (e.Row.RowType == DataControlRowType.DataRow)
//{
// LinkButton l = (LinkButton)e.Row.FindControl("LinkButton1");
// LinkButton l1 = (LinkButton)e.Row.FindControl("LinkButton2");
// //l1.Attributes.Add("onclick", "javascript:return " + "confirm('You are going to update your records" + DataBinder.Eval(e.Row.DataItem, "id") + "')");
// //l.Attributes.Add("onclick", "javascript:return " + "confirm('Are you sure you want to delete this record " + DataBinder.Eval(e.Row.DataItem, "id") + "')");
//}
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int i = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString());
//GridView1.EditIndex = e.RowIndex + 1;
//int i = GridView1.EditIndex;
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\ayush_pratap_singh\Documents\Visual Studio 2010\Projects\Cascadingmenu\Cascadingmenu\App_Data\Database1.mdf;Integrated Security=True;User Instance=True";
con.Open();
string query = "delete from detail1 where id=" + i.ToString();
SqlCommand cmd = new SqlCommand(query, con);
int numrow = cmd.ExecuteNonQuery();
con.Close();
cmd.Dispose();
con.Dispose();
bind();
Response.Redirect("default.aspx");
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
bind();
}
protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
if (e.Exception == null)
{
Label1.Text = "Row updated successfully.";
}
else
{
e.ExceptionHandled = true;
Label1.Text = "An error occurred while attempting to update the row.";
}
bind();
//Response.Redirect("default.aspx");
}
}
}
aspx文件中的
。
< asp： content>
in the aspx file.
<asp:content>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<p>
TECHNOLOGY<asp:DropDownList ID="ddltech" runat="server" Height="26px"
onselectedindexchanged="ddltech_SelectedIndexChanged" Width="146px" AutoPostBack="true">
</asp:DropDownList>
SKILLS<asp:DropDownList ID="ddlspec" runat="server"
onselectedindexchanged="ddlspec_SelectedIndexChanged" Height="27px"
Width="174px" AutoPostBack="true">
</asp:DropDownList>
</p>
<asp:Label ID="Label1" runat="server" Text="Label" Visible="False"></asp:Label>
<br />
<br />
SKILL:-<asp:TextBox ID="TextBox7" runat="server"></asp:TextBox>
TECHNOLOGY:-<asp:TextBox ID="TextBox8"
runat="server"></asp:TextBox>
EXPERIENCE:-<asp:TextBox ID="TextBox9" runat="server"></asp:TextBox>
<br />
<br />
<br />
<asp:Panel ID="Panel2" runat="server" Height="142px" Visible="False">
<asp:Table ID="Table1" runat="server">
</asp:Table>
</asp:Panel>
<br />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit" />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<asp:GridView ID="GridView1" runat="server" DataKeyNames="id" CellPadding="4"
ForeColor="#333333" GridLines="None" Height="104px" Width="468px"
AutoGenerateColumns="False" DataSourceID="SqlDataSource1" AllowPaging="True"
ondatabound="GridView1_DataBound"
onpageindexchanging="GridView1_PageIndexChanging"
onrowcancelingedit="GridView1_RowCancelingEdit"
onrowcommand="GridView1_RowCommand" onrowdatabound="GridView1_RowDataBound"
onrowdeleting="GridView1_RowDeleting" onrowupdating="GridView1_RowUpdating"
onselectedindexchanged="GridView1_SelectedIndexChanged" PageSize="5"
onrowediting="GridView1_RowEditing" onrowupdated="GridView1_RowUpdated">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="text1" HeaderText="text1" ReadOnly="true" SortExpression="text1" />
<asp:BoundField DataField="text2" HeaderText="text2" SortExpression="text2" />
<asp:BoundField DataField="text3" HeaderText="text3" SortExpression="text3" />
<asp:BoundField DataField="subjects" HeaderText="subjects" ReadOnly="true"
SortExpression="subjects" />
<asp:BoundField DataField="text5" HeaderText="text5" SortExpression="text5" />
<asp:BoundField DataField="text6" HeaderText="text6" SortExpression="text6" />
<asp:BoundField DataField="text7" HeaderText="text7" SortExpression="text7" />
<asp:BoundField DataField="text8" HeaderText="text8" SortExpression="text8" />
<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False"
ReadOnly="true" SortExpression="id" />
<asp:TemplateField>
<EditItemTemplate>
<asp:LinkButton ID="LinkButtonUpdate" runat="server" CausesValidation="True" CommandName="Update" Text="Update" CommandArgument='<%# Eval("id") %>'></asp:LinkButton>
<asp:LinkButton ID="LinkButtonCancel" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="LinkButtonEdit" runat="server" CausesValidation="True" CommandName="Edit" Text="Edit" CommandArgument='<%# Eval("id") %>'></asp:LinkButton>
<asp:LinkButton ID="LinkButtonDelete" runat="server" CommandName="Delete" Text="Delete" CommandArgument='<%# Eval("id") %>'> </asp:LinkButton>
</ItemTemplate>
<%-- <FooterTemplate>
<asp:Button ID="Add" runat="server" CausesValidation="false" CommandName="AddNew" Text="Insert"></asp:LinkButton>
<asp:Button ID="Cancel" runat="server" CausesValidation="false" CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</FooterTemplate>--%>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<SortedAscendingCellStyle BackColor="#FDF5AC" />
<SortedAscendingHeaderStyle BackColor="#4D0000" />
<SortedDescendingCellStyle BackColor="#FCF6C0" />
<SortedDescendingHeaderStyle BackColor="#820000" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT * FROM [detail1]"></asp:SqlDataSource>推荐答案
ConnectionStrings:ConnectionString %>\"
SelectCommand=\"SELECT * FROM [detail1]\"></asp:SqlDataSource>
ConnectionStrings:ConnectionString %>" SelectCommand="SELECT * FROM [detail1]"></asp:SqlDataSource>
这篇关于更新网格视图的查询不起作用..代码正在执行但无法更新链接到gridview的数据表。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！
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