errors with static method

Valerie Meunier

Hi,

this code for catching sql general errors in a website project works good.

protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
if (e.Exception == null)
{
ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('ok');", true);
}
else
{
ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('Error!');", true);
e.ExceptionHandled = true;
}

Now, I want to put this code in a static method (in App_Code) in order to reuse it on several places in my project. But i get two errors:

using System;
using System.Web;
public class Class1
{
public static void Check()
{
if (e.Exception == null)
{

ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('ok');", true);
}
else
{
   ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('Error!');", true);

e.ExceptionHandled = true;
}
}
}

The first error is: 'e' doesn't exist in current context.

The 2nd error: 'ClientScript doesn't exist in current context (i also tried with Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('ok');", true), same error: 'Page' doesn't exist ...

Thanks for help.

8 Replies

Know the answer? Post it — somebody with the same question will find it here.

Valerie Meunier5y ago
I tried this:in the partial class Public Exception e { Get; set}; And this in the invoking page: obj.e()=true; Non invocable member ‘ScriptHandler.e’ cannot be used like a method.
Valerie Meunier5y ago
How do i set the propety ExceptionHandled?
Sachin Singh5y ago
what if you set the ExceptionHandled property, put a debugger on ShowDialog(), and check the flow went there or not.
protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {
bool isError= e.Exception==null?true:false;
ScriptHandler obj= new ScriptHandler(this.Page);
obj.ShowDialog(isError);
e.ExceptionHandled=true;
}
Valerie Meunier5y ago
Thanks but i still get the ugly aspx message and not ‘ok’ or ‘error’. I also had to change ‘page’ by ‘_page’ in the line with ScriptManager.RegisterClientScriptBlock(…) otherwise i get the error ‘the name ‘page’ does not exist in the current context.
Sachin Singh5y ago
sorry for the late reply, you can use this
Note:- you can simplify it further using delegates, let me know if you need a more generic solution.
public partial class ScriptHandler
{

    private Page _page;
    public ScriptHandler(Page myPage) {
        _page = myPage;
    }

    public void ShowDialog(bool isError)
    {
     if(!isError){

        ScriptManager.RegisterClientScriptBlock(page, this.GetType(), "", "alert('ok');", true);
}else
{
   ScriptManager.RegisterClientScriptBlock(page, this.GetType(), "", "alert('error');", true);
}    }

}
now, in the UI layer, you can invoke it as
protected void GridView1_RowUpdated(object sender, GridViewUpdatedEventArgs e)
    {
bool isError= e.Exception==null?true:false;
ScriptHandler obj= new ScriptHandler(this.Page);
obj.ShowDialog(isError);
}
Valerie Meunier5y ago
Hello, can you answer me, please? Giving an answer with errors doesn't help me at all.
Thanks.
Valerie Meunier5y ago
Thanks for replying, but did you test your code, because i still have two (other) errors and i had to add using System.Web.UI; in order to avoid another error on line 7.

1) a object reference is required for the non-static field, method or property 'PageClientScript'. (line 11)
2) EventArgs does not contain a definition for 'ExceptionHandled' and no accessible method 'ExceptionHandled' could be found ..(line 17).

And i guess i invoke the method by Class1.Check(e)?
Thanks
Sachin Singh5y ago
1. using System;
2. using System.Web;
3. public class Class1
4. {
5. public static void Check(EventArgs e)
6. {
7. Page page = (Page)(HttpContext.Current.Handler);
8. if (e == null)
9. {
11. Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('ok');", true);
12. }
13. else
14. {
15. Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('Error!');", true);
17. e.ExceptionHandled = true;
18. }
19. }
20. }