Disable ASP.Net Button inside GridView based on Session value using C# and VB.Net

Hi Lingers,

Please refer below sample.

HTML

<asp:GridView ID="gvDetails" runat="server" AutoGenerateColumns="false" OnRowDataBound="gvDetails_RowDataBound">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="ID" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Age">
            <ItemTemplate>
                <asp:Label ID="lblAge" runat="server" Text='<%# Eval("Age") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="Town" HeaderText="Town" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="lnkView" runat="server" Text="View" OnClick="View" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="lnkEdit" runat="server" Text="Edit" OnClick="Edit" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Namespace

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["privilege"] = 2;
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[4] { new DataColumn("Id"), new DataColumn("Name"), new DataColumn("Age"), new DataColumn("Town") });
        dt.Rows.Add(1, "Ares", 25, "Los Angeles");
        dt.Rows.Add(2, "Demon", 22, "New York");
        dt.Rows.Add(3, "Elena", 20, "Mystic Falls");
        dt.Rows.Add(4, "Rohan", 30, "Mumbai");
        dt.Rows.Add(5, "Amit", 18, "Las Vegas");
        gvDetails.DataSource = dt;
        gvDetails.DataBind();
    }
}

protected void View(object sender, EventArgs e)
{
}

protected void Edit(object sender, EventArgs e)
{
}

protected void gvDetails_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        Button lnkView = (e.Row.FindControl("lnkView") as Button);
        if (Convert.ToInt32(Session["privilege"]) == 2)
        {
            lnkView.Enabled = false;
        }
        else
        {
            lnkView.Enabled = true;
        }
    }
}

VB

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Session("privilege") = 2
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn(3) {New DataColumn("Id"), New DataColumn("Name"), New DataColumn("Age"), New DataColumn("Town")})
        dt.Rows.Add(1, "Ares", 25, "Los Angeles")
        dt.Rows.Add(2, "Demon", 22, "New York")
        dt.Rows.Add(3, "Elena", 20, "Mystic Falls")
        dt.Rows.Add(4, "Rohan", 30, "Mumbai")
        dt.Rows.Add(5, "Amit", 18, "Las Vegas")
        gvDetails.DataSource = dt
        gvDetails.DataBind()
    End If
End Sub

Protected Sub View(ByVal sender As Object, ByVal e As EventArgs)
End Sub

Protected Sub Edit(ByVal sender As Object, ByVal e As EventArgs)
End Sub

Protected Sub gvDetails_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim lnkView As Button = (TryCast(e.Row.FindControl("lnkView"), Button))

        If Convert.ToInt32(Session("privilege")) = 2 Then
            lnkView.Enabled = False
        Else
            lnkView.Enabled = True
        End If
    End If
End Sub

Screenshot