如何在asp.net中的动态控件中找到子控件及其值 [英] How to find the child controls and their values which are present in dynamic controls in asp.net
本文介绍了如何在asp.net中的动态控件中找到子控件及其值的处理方法，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
大家好，
我通过调用SP创建了基于动态临时表的动态gridview.在ItemTemplate中，使用了Lable子控件来显示值，在EditItemTmplate中，我使用了Lable和DropDowlList来显示值.
现在我的要求是，当用户单击更新"链接按钮时，我需要捕获所有列中所有控件中存在的值.
我的.aspx.cs代码如下:
Hi all,
I am created a dynamic gridview based on dynamic temparory table by calling SP. In ItemTemplate a used Lable child control to display values,in EditItemTmplate i used Lable and DropDowlList to display values.
Now my requirement is when ever user clicks Update link Button i need to capture the values present in all controls in all columns.
My .aspx.cs code is as follows:
gvVendorSupportDocuments.Columns.Clear();
SupportDocumentsForVerdorPersistence sdvpSearch = new SupportDocumentsForVerdorPersistence();
sdvpSearch.FromDate = Convert.ToDateTime(txtFromDate.Text);
sdvpSearch.ToDate = Convert.ToDateTime(txtToDate.Text);
sdvpSearch.InVendorID = Convert.ToInt32(txtVendorID.Text);
DataSet ds = sdvpSearch.GetSupportDocumentsForVendor();
dtcols = ds.Tables[0].Columns.Count;
dtrows = ds.Tables[0].Rows.Count;
//GridViewTemplate gvt = new GridViewTemplate(dtrows ,dtcols);
//gvt.colsize = dtcols;
//gvt.rowsize = dtrows;
for (int i = 0; i < dtcols; i++)
{
TemplateField TF = new TemplateField();
TF.HeaderText = Convert.ToString(ds.Tables[0].Columns[i].ColumnName);
for (int j = 0; j <dtrows; j++)
{
string colvalue = Convert.ToString(ds.Tables[0].Rows[j][i]);
TF.ItemTemplate = new GridViewTemplate(ListItemType.Item, colvalue, i, j, dtrows, dtcols);
TF.EditItemTemplate = new GridViewTemplate(ListItemType.EditItem, colvalue, i, j, dtrows, dtcols);
//if (colvalue == "")
// TF.Visible =Convert .ToBoolean ("false");
}
gvVendorSupportDocuments.Columns.Add(TF);
//gvVendorSupportDocuments.DataSource = ds;
//gvVendorSupportDocuments.DataBind();
}
gvVendorSupportDocuments.DataSource = ds;
gvVendorSupportDocuments.DataBind();
和GridViewTemplate的计算代码如下:
and GridViewTemplate calss code is as follows:
using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
namespace Vendor
{
public class GridViewTemplate:System.Web.UI.Page, ITemplate
{
public int iRowCount;
public int iColumnCount;
ListItemType templateType;
int i;
int j;
static object[,] values = new object[200, 200];
static int colNo = 0;
static int rowNo = 0;
public GridViewTemplate(ListItemType type, string colvalue, int colsno, int rowsno, int dtrows, int dtcols)
{
templateType = type;
i= colsno;
j = rowsno;
//object[][] values;
if (colvalue == "")
{
values[j, i] = "N/A";
}
else
{
values[j, i] = colvalue;
}
//value = colvalue;
iRowCount = dtrows;
iColumnCount = dtcols;
}
public void InstantiateIn(System.Web.UI.Control container)
{
//rowsize =Convert .ToInt32 (values )
Literal lc = new Literal();
Label lbl = new Label();
LinkButton lb = new LinkButton();
// CheckBox ckh = new CheckBox();
//TextBox tb1 = new TextBox();
DropDownList ddl = new DropDownList();
ddl.Items.Add("YES");
ddl.Items.Add("NO");
switch (templateType)
{
case ListItemType.Header:
//lc.Text = "<B>" + value + "</B>";
lb.Text = "Edit";
lb.CommandName = "EditButton";
container.Controls.Add(lb);
container.Controls.Add(lc);
break;
case ListItemType.Item:
//int noofrows=Convert .ToInt32 ( values.GetLength[0]);
//int noofcols =Convert .ToInt32 ( values.GetLength[1]);
while (rowNo < iRowCount)
{
while (colNo < iColumnCount)
{
lbl.Text = Convert.ToString(values[rowNo, colNo]);
colNo++;
break;
}
if (colNo >= iColumnCount)
{
rowNo++;
colNo = 0;
}
if (rowNo >= iRowCount)
{
rowNo = 0;
}
break;
}
container.Controls.Add(lbl);
//lbl.Text = value;
//ddl.Enabled = Convert.ToBoolean("False");
//container.Controls.Add(ckh);
break;
case ListItemType.EditItem:
//TextBox tb = new TextBox();
//tb.Text = "";
while (rowNo < iRowCount)
{
while (colNo < iColumnCount)
{
string fielddata = Convert.ToString(values[rowNo, colNo]);
if (fielddata == "NO" | fielddata == "YES")
{
ddl.SelectedValue = Convert.ToString(fielddata);
container.Controls.Add(ddl);
}
else
{
lbl.Text = Convert.ToString(fielddata);
container.Controls.Add(lbl);
}
colNo++;
break;
}
if (colNo >= iColumnCount)
{
rowNo++;
colNo = 0;
}
if (rowNo >= iRowCount)
{
rowNo = 0;
}
break;
}
//container.Controls.Add(tb);
break;
case ListItemType.Footer:
//lc.Text = "<I>" + value + "</I>";
container.Controls.Add(lc);
break;
}
}
}
}
请任何人帮助我获得我的要求.
在此先感谢
Uday
Please anybody help me to get my requirment.
Thanks in advance
Uday
推荐答案
据我所知，您可以从内部数据控件中获取子控件的值.
仅在如果您为该动态数据控件创建itemcommand事件.
在这里，我写了一些代码来获取内部数据控制值的子控制
只需检查一下
Hi,
Upto my knowledge you can able to get values for child controls from inner data control.
On only If you create itemcommand event for that dynamic data control.
Here I write some code for get child control of inner data control values
Just check as it is
<form id="form1" runat="server">
<div>
<asp:datalist id="DataList1" runat="server" width="60%" repeatcolumns="3" repeatdirection="Horizontal" xmlns:asp="#unknown">
OnItemDataBound="DataList1_ItemDataBound">
<HeaderTemplate>
</HeaderTemplate>
<itemtemplate>
<table>
<tr>
<td>
Head Item
<asp:label id="Label1" runat="server" text="<%#Container.DataItem %>">
</td>
</tr>
<tr>
<td>
<asp:datalist id="DataList2" runat="server" onitemcommand="DataList1_ItemCommand">
<HeaderTemplate>
<table>
</HeaderTemplate>
<itemtemplate>
<tr>
<td>
<asp:textbox id="TextBox1" runat="server">
</td>
<td>
<asp:linkbutton id="LinkButton1" runat="server" commandname="sd" commandargument="4">
<asp:label id="Label2" runat="server" text="<%#Container.DataItem %>">
</td>
</tr>
</itemtemplate>
<footertemplate>
</footertemplate></table>
</td>
</tr>
</table>
</itemtemplate>
<footertemplate>
</footertemplate>
</div>
</form>
文件后面的代码包含
And the code behind file contains
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
List<int> str = new List<int>();
str.Add(1);
str.Add(2);
str.Add(3);
str.Add(4);
str.Add(5);
str.Add(6);
DataList1.DataSource = str;
DataList1.DataBind();
}
}
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DataList dtlst = (DataList)e.Item.FindControl("DataList2");
Label lblid = (Label )e.Item.FindControl("Label1");
List<int> str = new List<int>();
str.Add(1);
str.Add(2);
str.Add(3);
str.Add(4);
str.Add(5);
str.Add(6);
dtlst.DataSource = str;
dtlst.DataBind();
}
}
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
int cnt=e.Item.Controls.Count;
TextBox cltr = (TextBox)e.Item.FindControl("TextBox1");
string uname = cltr.Text;
}
</int></int></int></int>
希望您能理解我的所作所为.
最后，我要说的是，如果您能够创建itemcommand事件，那么您的问题就可以解决.
在这里我使用了数据列表控件，也可以使用gridview
一切顺利.
I hope you''ll Understand What I did.
finally what I''m saying is If you able to create itemcommand event then your problem is solved.
Here I used datalist control you can use gridview also
All the Best.
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