Question

I am using Nested GridViews where each row in the gridview has child gridView. I am using RowDataBound Event of Parent GridView, to Binding Child GridView. My Problem is that, how to get Child GridView’s Button findcontrol value in Parent gridViews RowDataBound Event.

This is my Aspx page

         <asp:GridView ID="grdSubClaimOuter" SkinID="GridView" runat="server" Width="100%"
                    AutoGenerateColumns="false" OnRowDataBound="grdSubClaimOuter_RowDataBound" OnRowCommand="grdSubClaimOuter_RowCommand"
                    ShowFooter="false" AllowPaging="true" OnPageIndexChanging="grdSubClaimOuter_PageIndexChanging">
                    <%--<AlternatingRowStyle BackColor="ButtonFace" />--%>
                    <Columns>
                        <asp:TemplateField ItemStyle-Width="5%">
                            <ItemTemplate>
                                <asp:HiddenField ID="hdnClaimNo" runat="server" Value='<%# Eval("ClaimNo") %>' />
                                <asp:Image runat="server" ID="img1" ImageUrl="../images/Collapse_plus.png" />
                            </ItemTemplate>
                            <ItemStyle Width="5%"></ItemStyle>
                        </asp:TemplateField>
              <asp:GridView ID="grdSubClaim" runat="server" SkinID="GridView" CellPadding="4" Width="100%"
                                    AutoGenerateColumns="false" ShowFooter="false" OnRowEditing="grdSubClaim_RowEditing"
                                    OnRowCommand="grdSubClaim_RowCommand" OnRowDeleting="grdSubClaim_RowDeleted" 
                                    AllowPaging="false" >
                                    <%--SkinID="GridView"--%>
                                    <Columns>
                                        <asp:TemplateField FooterStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left">
                                            <HeaderTemplate>
                                                Sub Claim No
                                            </HeaderTemplate>
                                            <ItemTemplate>
                                                <asp:Label ID="lblSubClaimNoValue" Width="" runat="server" Text='<%#Eval("SubClaimNo")%>'></asp:Label>
                                            </ItemTemplate>
                                            <FooterStyle HorizontalAlign="Left" />
                                        </asp:TemplateField>
           <asp:Button ID="btnSubrogation" CssClass="groovybutton" runat="server" CommandName="Subrogation"
                                                    Text="Subrogation" CommandArgument='<%# Eval("ClaimNo") + "~" + Eval("SubClaimNo")%>' />
                                                <asp:Button ID="btnSalvage" CssClass="groovybutton" runat="server" CommandName="Salvage"
                                                    Text="Salvage" CommandArgument='<%# Eval("ClaimNo") + "~" + Eval("SubClaimNo")%>' />
                                            </ItemTemplate>
                                        </asp:TemplateField>
                                    </Columns>
                                    <AlternatingRowStyle CssClass="" />
                                    <RowStyle CssClass="ob_gBody" />
                                    <HeaderStyle CssClass="gridHeader" />
                                </asp:GridView>
                                <asp:Literal runat="server" ID="Literal2" Text="</td></tr>" />
                            </ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>

This is My aspx.cs file

 protected void grdSubClaimOuter_RowDataBound(object sender, GridViewRowEventArgs e)
{

    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        if (e.Row.Cells[1].Text.ToString() != " ")
        {
            Literal ltrChild = (Literal)e.Row.FindControl("ltrChild");
            System.Web.UI.WebControls.Image img = (System.Web.UI.WebControls.Image)e.Row.Cells[0].FindControl("img1");

            ltrChild.Text = ltrChild.Text.Replace("trChildGrid", "trChildGrid" + e.Row.RowIndex.ToString());
            string strChildGrid = "trChildGrid" + e.Row.RowIndex.ToString();
            e.Row.Cells[0].Attributes.Add("OnClick", "OpenTable('" + strChildGrid + "','" + img.ClientID + "')");
            e.Row.Cells[0].RowSpan = 1;
            System.Web.UI.WebControls.GridView gvChild = (System.Web.UI.WebControls.GridView)e.Row.FindControl("grdSubClaim");
            PolicyProcessor.DAL.Claim.ClaimSubClaim objDALClaimSubClaim = new PolicyProcessor.DAL.Claim.ClaimSubClaim();
            PolicyProcessor.BOL.Claim.ClaimSubClaim objInfoClaimSubClaim = new PolicyProcessor.BOL.Claim.ClaimSubClaim();
            HiddenField hdnClaimNo = (HiddenField)e.Row.FindControl("hdnClaimNo");

            if (hdnClaimNo.Value != "")
            {
                objInfoClaimSubClaim.ClaimNo = hdnClaimNo.Value;
            }
            else
            {
                objInfoClaimSubClaim.ClaimNo = "0";
            }

            DataSet dsChild;
            dsChild = objDALClaimSubClaim.ResultSet(objInfoClaimSubClaim, "SelectInnerGrid");
            if (dsChild.Tables[0].Rows.Count > 0)
            {


                Button btn = (Button)gvChild.FindControl("btnSalvage");

           //btn is null how to get text value in btn

                btn.ForeColor = System.Drawing.Color.Red;


                gvChild.DataSource = dsChild;
                gvChild.DataBind();

            }
            else
            {
                Helper.EmptyGrid(gvChild, dsChild.Tables[0]);
            }

        }

    }
}

if anyone knows it,please help me solve this problem.thanks in advance.

Answer 1

First get a reference to the child GridView, then use FindControl to get the Button inside it:

foreach (GridViewRow row in grdSubClaimOuter.Rows) 
{
if (row.RowType == DataControlRowType.DataRow) 
{
    GridView gvChild = (GridView) row.FindControl("grdSubClaim");
    // Then do the same method for Button control column 
    if (gvChild != null)
    {
        foreach (GridViewRow row in gvChild .Rows) 
        {
            if (row.RowType == DataControlRowType.DataRow) 
            {
                Button btn = (Button ) row.FindControl("buttonID");
                if (btn != null )
                {
                    // do your work
                }
            }
        }
    }
}
}