从C＃代码传递文件路径到Javascript函数

Question

I have this javascript function in a .aspx file.

<script>
function somefun(value) 
{
       document.getElementById("myFlash").SetVariable("player:jsUrl", value);
       document.getElementById("myFlash").SetVariable("player:jsPlay", "");

}
</script>

I'm calling and passing a value to that function inside a onclick event in the code-behind class.

protected void DownloadFile(object sender, EventArgs e)
    {
        string filePath1 = "Audio/songname.mp3";

        ScriptManager.RegisterClientScriptBlock(this, typeof(string), "Registering", String.Format("somefun('{0}');", filePath1), true);


    }

But when I click the button, I'm getting this error. 'Unable to get property 'SetVariable' of undefined or null reference'

The javascript function is correct and I checked it. I think something is wrong with the way I passing the parameter.

Answer 1

The javascript function is correct and I checked it.

I don't think so. The error message suggests that document.getElementById("myFlash") return null , therefore you got an exception when trying to call SetVariable() on a null reference. This has nothing to do with the function parameter, at least not yet.