Question

106

Not getting ClientID in ASP.Net

rated 0 times [ 108] [ 2] / answers: 1 / hits: 66335 / 11 Years ago, mon, april 22, 2013, 12:00:00

I have ASP.Net page where i am calling a JavaScript function like this:

 Enter server name: <asp:TextBox ID=txt_name runat=server></asp:TextBox>

 <asp:Button ID=btn_view runat=server OnClick=View_btn_click OnClientClick=return  AlertOnGo('View Configuration',document.getElementById('<%= txt_name.ClientID %>').value) Text =GO! />

But on clicking the GO button, i am getting the following error:

JavaScript runtime error: Unable to get property 'value' of undefined or null reference

On viewing the rendered code for the button:

<input type=submit name=btn_view value=GO! onclick=return AlertOnGo('View Configuration',document.getElementById('<%= txt_name.ClientID %>').value); id=btn_view />

It is not putting the appropriate ClientID. I tried setting the CLientIDMode to static for the test box, yet no help.

This question is similar to this unanswered question.

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

collinarnoldp

Add To Favorites

Follow

Total Points: 10

Total Questions: 122

Total Answers: 109

Location: Spain

Member since Thu, Dec 23, 2021

2 Years ago

collinarnoldp questions

1 React datepicker disable entering date manually

Mon, Jul 26, 21, 00:00, 3 Years ago

1 Programmatically open each expansion panel in Vuetify

Tue, Jul 21, 20, 00:00, 4 Years ago

1 Avoid auto indent when saving in Visual Studio Code

Sun, May 10, 20, 00:00, 4 Years ago

1 React with Antd Form onFinish not retrieve data

Mon, Apr 13, 20, 00:00, 4 Years ago

1 TYPESCRIPT : Argument of type 'typeof X' is not assignable to parameter of type 'Y' with extends

Thu, Apr 2, 20, 00:00, 4 Years ago

View All

answered 11 Years ago anyssaarielles · Accepted Answer

There are a few solutions to this problem.

One of the simpler would be to move the name into a JavaScript variable since the problem only occurs within the control when trying to evaluate txt_name.ClientID inside the OnClientClick attribute of an ASP.NET control.

<script>

var txtName = '<%= txt_name.ClientID %>';

</script>



Enter server name: <asp:TextBox ID=txt_name runat=server></asp:TextBox>

 <asp:Button ID=btn_view runat=server OnClick=View_btn_click 

OnClientClick=return  AlertOnGo('View Configuration', 

document.getElementById(txtName).value) Text =GO! />