Display (Show) Yes / No instead of True / False in GridView using C# and VB.Net in ASP.Net

Hi phonghue,

Check this example. Now please take its reference and correct your code.

HTML

C#

<asp:GridView runat="server" ID="gvDetails" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Yes / No">
            <ItemTemplate>
                <asp:Label Text='<%# Convert.ToBoolean(Eval("IsActive"))? "Yes" : "No" %>' runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

VB.Net

<asp:GridView runat="server" ID="gvDetails" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Yes / No">
            <ItemTemplate>
                <asp:Label Text='<%# If(Convert.ToBoolean(Eval("IsActive")) = True , "Yes", "No") %>'
                    runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.Add(new System.Data.DataColumn("Id"));
        dt.Columns.Add(new System.Data.DataColumn("Name"));
        dt.Columns.Add(new System.Data.DataColumn("IsActive"));
        dt.Rows.Add(1, "John", true);
        dt.Rows.Add(2, "Robert", false);
        gvDetails.DataSource = dt;
        gvDetails.DataBind();
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As System.Data.DataTable = New System.Data.DataTable()
        dt.Columns.Add(New System.Data.DataColumn("Id"))
        dt.Columns.Add(New System.Data.DataColumn("Name"))
        dt.Columns.Add(New System.Data.DataColumn("IsActive"))
        dt.Rows.Add(1, "John", True)
        dt.Rows.Add(2, "Robert", False)
        gvDetails.DataSource = dt
        gvDetails.DataBind()
    End If
End Sub

Screenshot