XssExample1.aspx

<asp:SqlDataSource
    id="SqlDataSource1"
    runat="server"
    DataSourceMode="DataReader"
    ConnectionString="Data Source=DESKTOP-SMGAGD2\SQLEXPRESS;Initial Catalog=XssTest;Integrated Security=True;Connection Timeout=20"
    SelectCommand="SELECT Text FROM Table_1">
</asp:SqlDataSource>

<asp:GridView
    id="GridView1"
    runat="server"
    DataSourceID="SqlDataSource1">
    <Columns>
          <asp:TemplateField HeaderText="Text">
              <ItemTemplate>
                  <asp:TextBox ID="Text" runat="server" Text='<%# Bind("Text") %>'></asp:TextBox>
              </ItemTemplate>
          </asp:TemplateField>
     </Columns>
</asp:GridView>