Use a ASP.NET Eval() function in a ternary operator

Please refer this code

You have to set it this way

Text='<%# Convert.ToInt32(Eval("Column1").ToString().Length) > 0 ? "A" : "B" %>'

HTML:

<form id="form1" runat="server">
<div>
    <asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
        runat="server" AutoGenerateColumns="false">
        <Columns>
            <asp:TemplateField HeaderText="Column1">
                <ItemTemplate>
                    <asp:Label Text='<%# Convert.ToInt32(Eval("Column1")) == 1 ? "A" : "B" %>' runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>
</div>
</form>

C#:

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[1] { new DataColumn("Column1", typeof(int)) });
        dt.Rows.Add(1);
        dt.Rows.Add(2);
        dt.Rows.Add(1);
        dt.Rows.Add(2);

        GridView1.DataSource = dt;
        GridView1.DataBind();        
    }
}

Image:

Thank You.