How to find Control in TemplateField of GridView?

Question

How does FindControl method works if I need to find any Control which is inside GridView Template, more specifically ItemTemplate?

I have a hyperlink but it is not able to find the same.

Question updated with code

GridView Code is below:

<asp:GridView ID="grvYourOpportunities" runat="server" AllowPaging="True" AutoGenerateColumns="False"         DataKeyNames="ID#,B,H" PageSize="20" CellPadding="4" ForeColor="#333333" GridLines="Both"         OnRowDataBound="grvYourOpt_RowDataBound">         <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />         <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />         <Columns>           <asp:TemplateField>                 <HeaderTemplate>                     i                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("i") %>                 </ItemTemplate>             </asp:TemplateField>              <asp:TemplateField>                 <HeaderTemplate>                     H                 </HeaderTemplate>                 <ItemTemplate>                      <%--<a href="javascript:ShowChildGrid('div<%# Eval("ID#") %>');">                     <img id="imgdiv<%# Eval("ID#") %>" alt="Click" border="0" src="plus.gif" runat="server" />  </a>  --%>                      <asp:HyperLink runat="server" ID="hlPlus" ImageUrl="~/plus.gif"></asp:HyperLink>                  </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     B                 </HeaderTemplate>                 <ItemTemplate>                     <%--<%# Eval("B") %>--%>                     <a href="javascript:ShowChildGridForBCol('div1<%# Eval("ID#") %>');">                         <img id="imgdiv1<%# Eval("ID#") %>" alt="Click here" border="0" src="tempY.png" />                     </a>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     ID.Nr.                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("ID#")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Entry Date                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Entry Date") %>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField HeaderStyle-Width="20px" ItemStyle-Width="20px">                 <HeaderTemplate>                     BU                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("BU")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     BE                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("BE")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Product Family                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Product Family")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Project Name                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Project Name")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     SOP                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("SOP")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Award Date                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Award Date")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Milestone Next Date                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Milestone Next Date")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Contract Status                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Contract Status")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Prob.Of Success                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("ProbSuccess")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Key Account                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Key Account")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Sales SubRegion                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Sales SubRegion")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Growth                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("Growth")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Sales p.a.OE mio$                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("SalesOE")%>                 </ItemTemplate>             </asp:TemplateField>             <asp:TemplateField>                 <HeaderTemplate>                     Sales p.a.AM mio$                 </HeaderTemplate>                 <ItemTemplate>                     <%# Eval("SalesAM")%>                 </ItemTemplate>             </asp:TemplateField>             <%--GridView 2, 3--%>             <asp:TemplateField>                 <ItemTemplate>                     <tr>                         <td align="left" style="margin-left: 10px;" colspan="5">                             <div id="div<%# Eval("ID#") %>" style="display: none; position: relative; left: 110px;">                                 <asp:GridView ID="GridView2" runat="server" Width="40%" AutoGenerateColumns="false"                                     DataKeyNames="Entry Date" EmptyDataText="No orders for this customer." CellPadding="0"                                     ForeColor="#333333" GridLines="Both">                                     <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />                                     <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />                                     <HeaderStyle CssClass="header" />                                     <RowStyle CssClass="row" />                                     <Columns>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("ID#")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Entry Date") %>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("ID#")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField ItemStyle-Wrap="false">                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Other Text") %>                                             </ItemTemplate>                                         </asp:TemplateField>                                     </Columns>                                 </asp:GridView>                             </div>                         </td>                     </tr>                     <tr>                         <td align="left" colspan="19">                             <div id="div1<%# Eval("ID#") %>" style="display: none; position:relative; left: 110px;">                                 <asp:GridView ID="GridView3" runat="server" AutoGenerateColumns="false" DataKeyNames="Entry Date"                                     EmptyDataText="No orders for this customer." CellPadding="0" ForeColor="#333333"                                     GridLines="Both" Width="100%">                                     <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />                                     <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />                                     <%--<HeaderStyle CssClass="header" />                                     <RowStyle CssClass="row" />--%>                                     <Columns>                                          <%--<asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                             </ItemTemplate>                                         </asp:TemplateField>--%>                                          <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("ID#")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                        <%-- <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Entry Date") %>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField HeaderStyle-Width="20px" ItemStyle-Width="20px">                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("BU")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("BE")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Product Family")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Project Name")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("SOP")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Award Date")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Milestone Next Date")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Contract Status")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("ProbSuccess")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Key Account")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Sales SubRegion")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("Growth")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("SalesOE")%>                                             </ItemTemplate>                                         </asp:TemplateField>                                         <asp:TemplateField>                                             <HeaderTemplate>                                             </HeaderTemplate>                                             <ItemTemplate>                                                 <%# Eval("SalesAM")%>                                             </ItemTemplate>                                         </asp:TemplateField>--%>                                     </Columns>                                 </asp:GridView>                             </div>                         </td>                     </tr>                 </ItemTemplate>             </asp:TemplateField>         </Columns>     </asp:GridView> 

The RowDataBound event of the parent GridView is as below;

Protected void grvYourOpt_RowDataBound(object sender, GridViewRowEventArgs e) {     if (e.Row.RowType == DataControlRowType.DataRow)     {         string colId = grvYourOpportunities.DataKeys[e.Row.RowIndex].Values[0].ToString();         string colB = grvYourOpportunities.DataKeys[e.Row.RowIndex].Values[1].ToString();         string colH = grvYourOpportunities.DataKeys[e.Row.RowIndex].Values[2].ToString();          #region "Commented Code for Col.B"          //if (colB == "Y")         //{         //    e.Row.Cells[2].Text = "<img src='tempY.png'>";          //}         //else         //{         //    e.Row.Cells[2].Text = "<img src='tempN.png'>";         //}         #endregion          #region "Commented code for Col.H"          if (colH == "1")         {             e.Row.Cells[1].Text = string.Empty;             //e.Row.Cells[1].Text = "<a href=''> <img id='13' alt='Click' border='0' src='plus.gif'/> </a>";             string js = string.Format("javascript:ShowChildGrid('div{0}');", colId);             HyperLink lnk = (HyperLink)e.Row.FindControl("hlPlus");             if (lnk!=null)             {                 lnk.NavigateUrl = js;                 lnk.ImageUrl = "plus.gif";                 lnk.Visible = true;             }             //Page.ClientScript.RegisterStartupScript(this.GetType(), "HCol", "ShowChildGrid("+ colId + ");", true);         }         else         {             e.Row.Cells[1].Text = string.Empty;             e.Row.Cells[1].Text = "";         }         #endregion          DataTable dt1 = new DataTable();         DataTable dt2 = new DataTable();          DataRow dr1 = null;         DataRow dr2 = null;         DataRow dr3 = null;         DataRow dr4 = null;         DataRow dr5 = null;         DataRow dr7 = null;          DataRow r = dt1.NewRow();          DataSet ds1 = new DataSet();         DataSet ds2 = new DataSet();          dt1.TableName = "Opportunity1";          dt1.Columns.Add(new System.Data.DataColumn("ID#", typeof(System.String)));         dt1.Columns.Add(new System.Data.DataColumn("Entry Date", typeof(System.String)));         dt1.Columns.Add(new System.Data.DataColumn("Other Text", typeof(System.String)));         ds1.Tables.Add(dt1);          dt2.Columns.Add(new System.Data.DataColumn("ID#", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Entry Date", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("BU", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("BE", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Product Family", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Project Name", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("SOP", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Award Date", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Milestone Next Date", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Contract Status", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("ProbSuccess", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Key Account", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Sales SubRegion", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("Growth", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("SalesOE", typeof(System.String)));         dt2.Columns.Add(new System.Data.DataColumn("SalesAM", typeof(System.String)));         ds2.Tables.Add(dt2);          dr2 = dt1.NewRow();         dr3 = dt1.NewRow();         dr4 = dt1.NewRow();         dr5 = dt1.NewRow();          dr1["ID#"] = "";         dr2["ID#"] = "";         dr3["ID#"] = "";         dr4["ID#"] = "";         dr5["ID#"] = "";          dr1["Entry Date"] = "18/01/2010";         dr2["Entry Date"] = "19/01/2010";         dr3["Entry Date"] = "20/01/2010";         dr4["Entry Date"] = "21/01/2010";         dr5["Entry Date"] = "14/01/2010";          dr1["Other Text"] = "17:25CET changed by"; // - product family: ABS, Milestone Date: 23.02.1022, Contract Status: Signed, Probability of success: 100%";         dr2["Other Text"] = "18:44CET changed by"; //- product family: ABS, Milestone Date: 23.02.1022, Contract Status: Signed, Probability of success: 100%";         dr3["Other Text"] = "19:25CET changed by"; //- product family: ABS, Milestone Date: 23.02.1022, Contract Status: Signed, Probability of success: 100%";         dr4["Other Text"] = "14:25CET changed by"; //- product family: ABS, Milestone Date: 23.02.1022, Contract Status: Signed, Probability of success: 100%";         dr5["Other Text"] = "11:25CET changed by"; //- product family: ABS, Milestone Date: 23.02.1022, Contract Status: Signed, Probability of success: 100%";          dt1.Rows.Add(dr1);         dt1.Rows.Add(dr2);         dt1.Rows.Add(dr3);         dt1.Rows.Add(dr4);         dt1.Rows.Add(dr5);          GridView gv12 = (GridView)e.Row.FindControl("GridView2");         gv12.DataSource = ds1.Tables[0];         gv12.DataBind();          for (int i = 0; i < gv12.Rows.Count; i++)         {             gv12.RowStyle.BackColor = System.Drawing.Color.Gray;         }           dr7 = dt2.NewRow();          dr7["ID#"] = "11-0101";         dr7["Entry Date"] = "19/01/2010";         dr7["BU"] = "VDC";         dr7["BE"] = "ASES";         dr7["Product Family"] = "Car Air Systems";         dr7["Project Name"] = "Example";         dr7["SOP"] = "09/08/2011";         dr7["Award Date"] = "10/2011";         dr7["Milestone Next Date"] = System.DateTime.Today.ToString("dd.MM.yyyy");         dr7["Contract Status"] = "won";         dr7["ProbSuccess"] = "70%";         dr7["Key Account"] = "E-Paccar";         dr7["Sales SubRegion"] = "North America";         dr7["Growth"] = "10%";         dr7["SalesOE"] = "150";         dr7["SalesAM"] = "18";          dt2.Rows.Add(dr7);          GridView gv13 = (GridView)e.Row.FindControl("GridView3");         gv13.DataSource = ds2.Tables[0];         gv13.DataBind();     } } 

The hyperlink hlPlus is a hyperlink field inside GridView's Template Field(Item Template).

Answer 1

Try this:

foreach(GridViewRow row in GridView1.Rows) {     if(row.RowType == DataControlRowType.DataRow) {         HyperLink myHyperLink = row.FindControl("myHyperLinkID") as HyperLink;     } } 

If you are handling RowDataBound event, it's like this:

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) {     if(e.Row.RowType == DataControlRowType.DataRow)     {         HyperLink myHyperLink = e.Row.FindControl("myHyperLinkID") as HyperLink;     } } 

Answer 2

You can use this code to find HyperLink in GridView. Use of e.Row.Cells[0].Controls[0] to find First position of control in GridView.

protected void AspGrid_RowDataBound(object sender, GridViewRowEventArgs e) {       if(e.Row.RowType == DataControlRowType.DataRow)     {         DataRowView v = (DataRowView)e.Row.DataItem;                     if (e.Row.Cells.Count > 0 && e.Row.Cells[0] != null && e.Row.Cells[0].Controls.Count > 0)         {             HyperLink link = e.Row.Cells[0].Controls[0] as HyperLink;             if (link != null)             {                                         link.Text = "Edit";             }                        }             } }