Data Presentation Controls

Re: Access Dynamic GridView ItemTemplate after postback

harinathch — Mon, 02 Nov 2009 15:17:07 GMT

Hi Rajesh, We are also facing the same issue. Please let us know what is the solution for the above problem on how to save the data.

Thanks,

HarinathCh

Re: Access Dynamic GridView ItemTemplate after postback

Karl Cheng - MSFT — Fri, 01 Feb 2008 09:01:45 GMT

Hi krajeshkumar

I write some codes and run in my side. Here I suggest you to use Page.LoadTemplate("......") instead of using ITemplate. When postback the data in ViewState can't find the controls they are belonged to because this time these controls haven't been created at Page_Load. It will take much work to keep the state and there will be some problems in finding the controls.

You can have a look at my code and see how I find the controls.

.cs file

        protected void Page_Init(object sender, EventArgs e) {
            TemplateField tf = new TemplateField();
            tf.ItemTemplate = Page.LoadTemplate("../WebUserControl1.ascx");
            this.GridView1.Columns.Add(tf);


        }
        protected void Page_Load(object sender, EventArgs e)
        {
            //The file shown below is the way to find your control
            for(int i=0;i<GridView1.Rows.Count;i++)
            {
                if (GridView1.Rows[i].RowType == DataControlRowType.DataRow)
                {
                    TableCell tc = GridView1.Rows[i].Cells[0];
                    WebUserControl1 wuc = tc.Controls[0] as WebUserControl1;
                    if (wuc != null)
                    {
                        Response.Write(((TextBox)wuc.FindControl("TextBox1")).Text +"<br/>");
                    }
                }
            }
        }

.ascx file

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserControl1.ascx.cs" Inherits="DA_Simu.WebUserControl1" %>
ABC:<asp:TextBox ID="TextBox1" runat="server" Text='<%#Eval("Oname") %>'></asp:TextBox>

.aspx file

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="nestedgridview.aspx.cs" Inherits="DA_Simu.gridview.nestedgridview" %>

<%@ Register src="../WebUserControl1.ascx" tagname="WebUserControl1" tagprefix="uc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
           DataSourceID="SqlDataSource1" onrowdatabound="GridView1_RowDataBound">

        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server"
            ConnectionString="<%$ ConnectionStrings:simudbConnectionString %>"
            SelectCommand="SELECT [Oid], [Onum], [Oname], [Ocategory] FROM [objects]"
            UpdateCommand="UPDATE objects SET Ocategory = @Ocategory WHERE (Oid = @Oid)">
            <UpdateParameters>
                <asp:Parameter Name="Ocategory" />
                <asp:Parameter Name="Oid" />
            </UpdateParameters>
        </asp:SqlDataSource>
        <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
    </form>
</body>
</html>

Hope my code can be useful to solve your problem. Please feel free to contact with me.

Karl

Re: Access Dynamic GridView ItemTemplate after postback

krajeshkumar — Wed, 30 Jan 2008 20:47:28 GMT

Sorry this doen't help me. This is what I want to do, on postback i want to fetch the dynamic ItemTemplate Control values using FindControl method in a Save method

Thanks

Re: Access Dynamic GridView ItemTemplate after postback

Joseph Ghassan — Wed, 30 Jan 2008 19:49:09 GMT

Hi, try to access the controls at Gridview DataBound event Here :

protected void GridView1_DataBound(object sender, EventArgs e)

{

}

Hope this helps,

Joseph

Re: Access Dynamic GridView ItemTemplate after postback

Joseph Ghassan — Wed, 30 Jan 2008 19:47:34 GMT

Hi, try to access the controls at Gridview DataBound event Here :

protected void GridView1_DataBound(object sender, EventArgs e)

{

}

Hope this helps,

Joseph

Access Dynamic GridView ItemTemplate after postback

krajeshkumar — Wed, 30 Jan 2008 19:28:57 GMT

Hi All,

I have a requirement to use gridview to show and update the information. Here the columns are not fixed, it needs to be dynamically generated. So for this I create a class extending ITemplate and created a ItemTemplate. There is no problem is load the grid, only the big problem is that I am not able to access the controls that are inside ItemTemplate on postback, Even after Init the girdview on postback it doesn't help me. So can you please guide me in getting a solution for the same.

Thnaks