Hi,
In .aspx page :
<asp:textbox id="txtName" runat="server" xmlns:asp="#unknown"></asp:textbox>
<asp:button id="btnAddToGrid" runat="server" onclick="btnAddToGrid_Click" xmlns:asp="#unknown"></asp:button>
<asp:gridview id="gvTest" runat="server" autogeneratecolumn="false" xmlns:asp="#unknown">
<asp:templatefield>
<itemtemplate>
<asp:lable id="lblName" runat="server" text="<%#Eval("Name")%>"></asp:lable>
</itemtemplate>
</asp:templatefield>
</asp:gridview>
In C# page :
private void On button click()
{
DataTable dtTest=new DataTable();
dtTest.Columns.Add("Name");
dtTest.Rows.Add(txtName.Text.Trim());
dtTest.AcceptChanges();
gvTest.DataSource=dtTest;
gvTest.DataBind();
}