Call JS function from Codebehind

Question

I use this code for call JS function from codebehind.

This is button click event.

 ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "myfunction", "testFunc();", true);

This is the code of JS.

function testFunc() {
//alert("msg");
document.getElementById("Text1").value = "value change";
//Text1 is html a text box
}

It's not change the value of the text box. But if i add alert, it is showing the alert which we can identify that the JS function is executing successfully.

What could be the problem of my code?

Answer 1

If document.getElementById("Text1") is textarea tag, use

document.getElementById("Text1").innerText = "value change";

Could you provie HTML for clarification?

Answer 2

Why not accessing the HTML Textbox via codebehind?

Use this to insert a value to a textbox:

Request.Form["yourHTMLTBName"] = "new Value inserted";

Decleration in HTML:

<input id="tbHTML" type="text" readonly="readonly" name="yourHTMLTBName"/>

Try to make it static: ClientIDMode="Static"