how to call javascript function from vb.net code?

Question

I have written VB.NET code for calling my Javascript function showDisplay().

vb.net code:

System.Web.UI.ScriptManager.RegisterClientScriptBlock(Page, GetType(Page), "Script", "showDisplay();", True)

javascript code:

function showDisplay(){
alert('success');}

but this is not working, can you help?

possible duplicate of How to call javascript function from code-behind — The Hungry Dictator
– The Hungry Dictator, Commented Jan 20, 2014 at 5:52

Aaron Palmer · Accepted Answer · 2014-01-20 06:04:54Z

15

Perhaps you are looking for RegisterStartupScript:

ScriptManager.RegisterStartupScript(Me, Page.GetType, "Script", "showDisplay();", True)

Depending on where your showDisplay() javascript function exists in your code, using RegisterClientScriptBlock may not find it. This is because RegisterClientScriptBlock places the javascript at the top of your page, immediately after the viewstate. Using RegisterStartupScript will place the call to showDisplay() at the very bottom of your form, so it will be rendered last and your javascript function will have already been rendered and available.

edited Jan 20, 2014 at 6:04

answered Jan 20, 2014 at 5:58

Aaron Palmer

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3 Comments

clarifier Over a year ago

if showdisplay message have arguments how to send it?

Aaron Palmer Over a year ago

Depends. Does the server side have knowledge of the argument values? If so, put them inline showDisplay(\"StringValue1\", \"StringValue2\"). Are the values only available on the browser? If so, provide variable names and ensure that the JavaScript contains these variables prior to calling showDisplay(var1, var2).

krunal.cp Over a year ago

What if I have my JavaScript function wrote down under a different file?

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