javascript from c# code under button_click

Question

How to call javascript from c# code under button_click without using Button1.Attributes.Is there any method?

paul daniel · Answer

Hi see this function valSubmit() { var doc = document.forms[0]; var msg = ; if (doc.firstName.value == ) { msg += - Please enter a first name.n; } if (doc.lastName.value == ) { msg += - Please enter a last name.n; } if (msg == ) { doc.submit(); return true; } else { alert(The following errors were encountered.nn + msg); return false; } } This is the key line in the code: btnSubmit.Attributes.Add(onClick return valSubmit();); Thanks Paul daniel

Kirtan Patel · Answer

protected void Button1_Click( object sender EventArgs e) { Page.RegisterClientScriptBlock(    alert('Hello World !!!' )  ); }

Sam Hobbs · Answer

JavaScript executes in the client and C# executes in the server correct? So it is not possible to do it directly. There are many ways that the C# program in the server could cause the JavaScript in the client to execute and the best way to do it depends on what you need to do.