Bind Nested UserControl with a GridView to a parent GridView in an event[Answered] RSS

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Last post May 15, 2020 09:01 AM by Yang Shen

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Ruffone
Member

26 Points

155 Posts

Bind Nested UserControl with a GridView to a parent GridView in an event

May 14, 2020 01:55 PM|Ruffone|LINK

I found this SWEET piece of code that promise to simplify my Nested GridView I have a project that's making use of this strategy quite a bit (Nested GridView). It places the nested grid in a UserControl. My question is how to bind the GridView in the UserControl to the IList(Of T) DataSource. I'm thinking that I should Raise the event from within the DataBound event but i'm not sure. Your help would be much appreciated.

<asp:GridView ID="gvJobs" runat="server" DataKeyNames="Id,JobNumber,StartDate" OnRowDataBound="gvJobs_RowDataBound">
<Columns>
<asp:TemplateField HeaderText="Job ID" InsertVisible="false">
<ItemTemplate>
<asp:Label ID="lblJobID" Text='<%# Eval("Id") %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<div id="div<%# Eval("id") %>">
<uc1:EZPassesControl runat="server" ID="EZPassesControl1" Data='<%# Container.DataItem %>' />
</div>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

Protected Sub gvJobs_RowDataBound(sender As Object, e As GridViewRowEventArgs)
This Is how it gets done when the GridView Is nested directly in the Gridview
Dim row As GridViewRow = e.Row
Dim gv As GridView = New GridView()
gv = CType(row.FindControl("GridView2"), GridView)
gv.DataSource = ChildDataSource((CType(e.Row.DataItem, DataRowView))("startDate").ToString(), sortStr)
gv.DataBind()

This Is a sketchy code I tried in but it did'nt work.
Dim gv As GridView = New GridView()
gv = CType(row.FindControl("EZPassesControl1").FindControl("gvEZPasses"), GridView)
gv.DataSource = ChildDataSource((CType(e.Row.DataItem, DataRowView))("startDate").ToString(), strSort)
gv.DataBind()
End Sub

Yang Shen

Contributor

3140 Points

983 Posts

Re: Bind Nested UserControl with a GridView to a parent GridView in an event

May 15, 2020 09:01 AM|Yang Shen|LINK

Hi Ruffone,

Do you want to operate the GridView nested in userControl inside parent GridView control, for example to set its data source. If so, you can refer to the following example:

demo.aspx:

Hi,  Ruffone

        Do you want to operate the GridView nested in userControl inside parent GridView control, for example to set its data source. If so, you can refer to the following example:
demo.aspx
<%@ Register TagPrefix="uc" TagName="UserInfoBoxControl" Src="~/uControlDemo.ascx" %>
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="demo_Form" runat="server">
        <asp:GridView runat="server" ID="demoGV" AutoGenerateColumns="false" OnRowDataBound="demoGV_RowDataBound">
            <Columns>
                <asp:TemplateField HeaderText="ID">
                    <ItemTemplate>
                        <asp:Label runat="server" Text='<%# Eval("id") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="userControl">
                    <ItemTemplate>
                        <div style="height: 150px; width: 300px;">
                            <uc:UserInfoBoxControl runat="server" ID="uControl"></uc:UserInfoBoxControl>
                        </div>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="TXT">
                    <ItemTemplate>
                        <asp:Label runat="server" Text='<%# Eval("txt") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </form>
</body>
</html>

demo.aspx.cs

         demo.aspx.cs
public partial class Demo : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                String conStr = "Server=.;Database=TestDB;Trusted_Connection=True;";
                using (SqlConnection conn = new SqlConnection(conStr))
                {
                    DataTable dt = new DataTable();
                    String sql = "select id,txt from demoDB";
                    SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
                    sda.Fill(dt);
                    demoGV.DataSource = dt;
                    demoGV.DataBind();
                }
            }

        }

        protected void demoGV_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            String conStr = "Server=.;Database=TestDB;Trusted_Connection=True;";
            using (SqlConnection conn = new SqlConnection(conStr))
            {
                DataTable dt = new DataTable();
                String sql = "select id,txt from demoDB"; 
                SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
                sda.Fill(dt);

                uControlDemo uControl = (uControlDemo)e.Row.FindControl("uControl");
                if (uControl != null) {
                    GridView row = (GridView)uControl.FindControl("uc_GridView");
                    row.DataSource = dt;
                    row.DataBind();
                }
            }
        }
    }

uControlDemo.ascx

<asp:TextBox runat="server" ID="uc_txt"></asp:TextBox>
<asp:GridView ID="uc_GridView" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField HeaderText="uc_ID">
            <ItemTemplate>
                <asp:Label runat="server" Text='<%# Eval("id") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="uc_TXT">
            <ItemTemplate>
                <asp:Label runat="server" Text='<%# Eval("txt") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Result:

If this is not the result you expect, please clearly state what you want to do and provide more information, mainly including:

Page sample code
userControl

Hope it can help you.

Best Regard,

Yang Shen

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