using string as control id in C# ASP.NET-CodePudding

i have a page with 2 textbox items and a button textbox1 contains a word , and textbox2 is empty

now i want to put content of TextBox1.Text in TextBox2.Text with button click,

i tried:

protected void Button1_Click(object sender, EventArgs e) 
{ Page.FindControl("TextBox2").Text = TextBox1.Text; }

this code don't work ,how to make this work?

CodePudding user response：

You are trying to access the Text property of the TextBox2 control, but you are using the FindControl method to find the control. The FindControl method returns a Control object, and the Text property is not available on the Control class. To access the Text property, you need to cast the result of the FindControl method to a TextBox:

protected void Button1_Click(object sender, EventArgs e) 
{ 
    TextBox textBox2 = (TextBox)Page.FindControl("TextBox2");
    textBox2.Text = TextBox1.Text; 
}