Add LinkButton to ASP.Net GridView cell based on condition using C# and VB.Net

Hi mahjaubi,

Please refer the below modified sample.

HTML

<asp:GridView ID="gvCustomer2" runat="server" OnRowDataBound="OnRowDataBound">
    <AlternatingRowStyle BackColor="#CCCCCC" />
    <FooterStyle BackColor="#CCCCCC" />
    <HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
    <RowStyle VerticalAlign="Middle" />
    <SelectedRowStyle BackColor="#000099" ForeColor="White" BorderStyle="Dashed" BorderWidth="2px" Font-Bold="True" />
    <SortedAscendingCellStyle BackColor="#F1F1F1" />
    <SortedAscendingHeaderStyle BackColor="#808080" />
    <SortedDescendingCellStyle BackColor="#CAC9C9" />
    <SortedDescendingHeaderStyle BackColor="#383838" />
</asp:GridView>

Namespaces

C#

using System.Data;
using System.Configuration;
using System.Data.SqlClient;

VB.Net

Imports System.Data
Imports System.Configuration
Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[]{
                    new DataColumn("CustomerId"),
                    new DataColumn("Name"),
                    new DataColumn("Value",typeof(int))});
    dt.Rows.Add(1, "abc", 5);
    dt.Rows.Add(2, "xyz", -6);
    gvCustomer2.DataSource = dt;
    gvCustomer2.DataBind();
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        int value = int.Parse(e.Row.Cells[2].Text);
        if (value > 0)
        {
            LinkButton lnkSubmit = new LinkButton();
            lnkSubmit.ID = "lnkSubmit";
            lnkSubmit.Text = e.Row.Cells[2].Text;
            lnkSubmit.CommandArgument = (e.Row.RowIndex + 1).ToString();
            lnkSubmit.Click += new EventHandler(this.OnSubmit);
            e.Row.Cells[2].Controls.Add(new Label() { Text = " " });
            e.Row.Cells[2].Controls.Add(lnkSubmit);
        }
    }
}

protected void OnSubmit(object sender, EventArgs e)
{
    LinkButton lnkSubmit = sender as LinkButton;
    GridViewRow row = lnkSubmit.NamingContainer as GridViewRow;
    string message = "CustomerId: " + row.Cells(0).Text + @"\n Name: " + row.Cells(1).Text + @"\n Value: " + row.Cells(2).Text;
    MsgBox("aa");
    ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('" + message + "');", true);
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim dt As DataTable = New DataTable()
    dt.Columns.AddRange(New DataColumn() {
                        New DataColumn("CustomerId"),
                        New DataColumn("Name"),
                        New DataColumn("Value", GetType(Integer))})
    dt.Rows.Add(1, "abc", 5)
    dt.Rows.Add(2, "xyz", -6)
    gvCustomer2.DataSource = dt
    gvCustomer2.DataBind()
End Sub

Protected Sub OnSubmit(ByVal sender As Object, ByVal e As EventArgs)
    Dim lnkSubmit As LinkButton = TryCast(sender, LinkButton)
    Dim row As GridViewRow = TryCast(lnkSubmit.NamingContainer, GridViewRow)
    Dim message As String = "CustomerId: " & row.Cells(0).Text & "\n Name: " + row.Cells(1).Text & "\n Value: " + row.Cells(2).Text
    MsgBox("aa")
    ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('" & message & "');", True)
End Sub

Protected Sub OnRowDataBound(sender As Object, e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        If Not e.Row.Cells(2).Text = " " Then
            Dim value As Integer = Integer.Parse(e.Row.Cells(2).Text)
            If value > 0 Then
                Dim lnkSubmit = New LinkButton()
                lnkSubmit.ID = "lnkSubmit"
                lnkSubmit.Text = e.Row.Cells(2).Text
                lnkSubmit.CommandArgument = (e.Row.RowIndex + 1).ToString()
                AddHandler lnkSubmit.Click, AddressOf OnSubmit
                e.Row.Cells(2).Controls.Add(New Label() With {.Text = " "})
                e.Row.Cells(2).Controls.Add(lnkSubmit)
            End If
        End If
    End If
End Sub

Screenshot