get value text of label in grid view

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i have a grid view.
in grid view have :

ASP.NET

<asp:Label ID="IdTopic" runat="server" Text='<%# Eval("IDTopic") %>' Visible="false"></asp:Label>

out of grid view have :

ASP.NET

<asp:Label ID="lb1" runat="server" ></asp:Label>

i want get text from IdTopic and set on lb1.
all of them are into content page of master page.
in master page i writr this code:

JavaScript

function setLabel() {
           
            var IdTopictxt = $("#IdTopic").val;
            $("#lb1").text(IdTopictxt);


        }

in code-behind:c#

C#

ContentPlaceHolder cp = (ContentPlaceHolder)Master.FindControl("ContentPlaceHolder2");
            
            Label lb = (Label)cp.FindControl("IdTopic");
            if (lb != null)
            {
                ScriptManager.RegisterStartupScript(this, GetType(), "displayalertmessage", "ShowAlert();", true);
                mytxt.Text = lb.Text.ToString();

            }

my alert show but don,t show any in myTxt.
how i can do ?

Posted 9-Jul-14 8:55am

mor kan

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6 solutions

Solution 7

http://stackoverflow.com/questions/4979669/how-to-access-content-page-controls-from-master-page-in-asp-net[^]

Posted 10-Jul-14 5:06am

avanigaddagopal

Solution 4

this code help me but don,t work:

C#

foreach(GridViewRow row in gv.Rows)
{
    TextBox txtTotal = row.cells[0].Controls[0].FindControl("TOTAL") as TextBox;
    string value = txtTotal.Text;

    // Do something with the textBox's value
}

i changed code :

C#

ContentPlaceHolder cp = (ContentPlaceHolder)Master.FindControl("ContentPlaceHolder2");
GridView gv = (GridView)cp.FindControl("showPostrRGridView");
foreach (GridViewRow row in gv.Rows)
{
    Label txtTotal = row.FindControl("IdTopic") as Label;
    string value = txtTotal.Text;
    lb1.Text = value;
}

thank you for help me .

Posted 9-Jul-14 20:52pm

mor kan

Solution 6

my problem solved .

http://forums.asp.net/t/1537390.aspx?ASP+NET+C+How+to+get+the+cell+index+of+gridview+in+the+event+selectindexchanged+[^]
i should changed code :

ASP.NET

<asp:LinkButton ID="linkToPost" CommandName="ltp" Text='<%# Eval("titleTopic") %>' Font-Size="Large" Font-Names="b yekan" runat="server" ForeColor="#c6c574" OnClick="linkToPost_Click"></asp:LinkButton></td>

and

C#

protected void showPostrRGridView_RowCommand(object sender, GridViewCommandEventArgs e)
       {
           if (e.CommandName == "ltp")
           {
              LinkButton linkbtn=(LinkButton)e.CommandSource;

                   lb1.Text = linkbtn.Text;

               }
           }
       }

Posted 10-Jul-14 0:48am

mor kan

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