Question

I’m extending a web control. I need to call server methods on every event fired by the control instead of javascript.

public partial class MyTextBox : RadTextBox, IScriptControl
{
    public MyTextBox()
    {
        Attributes.Add("onBlur", "handleLostFocus();");
        Attributes.Add("runat", "server");
    }

    public void handleLostFocus()
    {
        MyObject obj = new MyObject();
        obj.someproperty = this.Text; //or somehow get the user entered text.

        MyService1 service = new MyService1();
        service.sendRequest(obj);
    }
}

Answer 1

As I said in my comment, TextBox will post by default if AutoPostBack = "True", however, you need to handle your event. Supposing your TextBox is named TextBox1:

protected void TextBox1_TextChanged(object sender, EventArgs e)
{
    string str = TextBox1.Text;
}

Get rid of handleLostFocus() or have it be the handler for your TextBox control.

Good luck mate.