Passing value to javascript from asp.net

Question

<script type="text/javascript">
function abc()
{
 var id = document.getElementById('123');
 var caption= <%=MyProperty %>;
}
</script>

code behind:

protected void Page_Load(object sender, EventArgs e)
{
 Page.RegisterStartupScript(Guid.NewGuid().ToString(),"<script language = 'javascript'>abc();</script>");
}
protected int MyProperty
{
 get
 {
 return 123;
 }
}

i need to pass string value to javascript, with int this codes works fine.

protected string MyProperty
{
 get
 {
 return "123";
 }
}

when i tried to pass string this code does't works.

• Steve B: remove incorrect spaces in "<script language = 'javascript'>abc();</script>". This should be "<script language='javascript' type="text/javascript">abc();</script>". You can also use this overload to automatically generate the script block: Page.ClientScript.RegisterStartupScriptBlock(typeofyourpage, "somekey", "abc();", true);

Answer 1

if you need to pass a String you have to specify the delimiters " or '

var caption= "<%=MyProperty %>";

or

var caption= '<%=MyProperty %>';

without them the javascript interprets the string value of MyProperty as the name of a Javascript variable.

• Franco Rondini: Steve B : I understand that @user1820649 wants to try protected string MyProperty; I may not have fully understood the purpose of the application.
• Fandango68: I get CS0103: The name 'MyProperty' does not exist in the current context