How do you pass variables from c# to javascript?

Question

Looking to pass variables from c# to javascript to use some jquery code. Passing doubles, ints, strings, arrays. Does anyone know how to do this?

for example if I ha

Answer 1

I recently used this ToJson() extension method along with Page.RegisterClientScriptBlock Method to pass down a multi-level mapping object that populates three levels of cascaded dropdowns.

Answer 2

Nevermind I think I figured it out. Assuming the code above, you can write in javascript:

<script type="text/javascript"> var JavascriptBlah = '<%=blah%>'</script>

This will pass the blah in c# to the JavascriptBlah on the client side. Then you can manipulate on client side.

Answer 3

you can use asp:HiddenField variables to pass values between codebehind and js.. this accomplished with viewstate of page during postbacks...

Answer 4

You need this(How Do I: Add JavaScript to An ASP.NET Page), I guess?

Answer 5

You can use public properties on the code behind as well as the session. Here is a sample using public properties that can be read from a Javascript function.

Front End:

function IsAgentInProgram()
{
    var optStatus = "<%=AgentOptInStatus%>";

    if (optStatus == "True")
        alert("You are opted in!");
    else
        alert ("You are opted OUT");
}

Code Behind:

public bool AgentOptInStatus;

private void Page_Load(object sender, System.EventArgs e)
{
    this.AgentOptInStatus = true;

}