ASP.NET C＃使用ClientScript.RegisterStartupScript传递参数

Question

I have the following code which should call a function called ShowPopup in my client side script but for reason, when I call this function nothing happens.

  string pg = "Test";
  ClientScript.RegisterStartupScript(this.GetType(), "Popup", "ShowPopup(pg);", true);

If I do the following:

ClientScript.RegisterStartupScript(
                   this.GetType(), "Popup", "ShowPopup('Test');", true);

it works fine. It does show up in the popup. Any idea what I may be doing wrong.

Answer 1

The problem is ShowPopup is expecting a string value.

Correct Code

string pg = "Test";
ClientScript.RegisterStartupScript(this.GetType(), "Popup",
   string.Format("ShowPopup('{0}');", pg), true);

About C# code will generate the following valid javascript -

<script>
   ShowPopup('Test');
</script>

Error Code

ClientScript.RegisterStartupScript(this.GetType(), "Popup", 
   "ShowPopup(pg);", true);

Notice that above code C# will generate the following invalid Javascript -

<script>
   ShowPopup(pg); // Invalid Javascript code
</script>

Answer 2

If you Used Update Panels Then You can Use:

string pg = "Test";
    ScriptManager.RegisterStartupScript(this, this.GetType(), Guid.NewGuid().ToString(), "alert('"+pg+"');", true);

Other Wise You can Use

string pg = "Test";
     ClientScript.RegisterStartupScript
                (GetType(),Guid.NewGuid().ToString(), "alert('"+pg+"');",true);

in your case

string pg = "Test";
 ClientScript.RegisterStartupScript
            (GetType(),Guid.NewGuid().ToString(), "ShowPopup('"+pg+"');",true);