Repeater the button control and responds to the Click action

Repeater the button control and responds to the Click action

protected void Page_Load (object sender, EventArgs e)
{
if (!this.ispostback)
{
String[] s = new string[] {"1", "2", "3", "4", "5"};

This.rpttest.datasource = s;
This.rpttest.databind ();
}
}
protected void Testbtn (object sender, EventArgs e)
{
Button BT = sender as button;

RepeaterItem ri = bt.parent as RepeaterItem;

TextBox tx = Ri.findcontrol ("TXT") as TextBox;
if (!object.equals (TX, NULL))
{
Response.Write (Tx.text);
}

}

<form id= "Form1" runat= "Server" >
<asp Tutorial: Repeater runat= "Server" id= "Rpttest" >
<itemtemplate>
<div>
<asp:textbox id= "txt" text= ' <%# container.dataitem.tostring ()%> ' runat= ' server '/>
<asp:button id= "BTN" text= "Submit" onclick= "TESTBTN" runat= "Server"/>
</div>
</itemtemplate>
</asp:repeater>
</form>