Prevent Error On Page When Resource Reference Is Invalid?
Sep 20, 2010
I'm using resources like this; " runat="server" />
Resources are maintained in a database and resourcefiles are generated when new translations are added. Sometimes bad references to keys happens. This results in error on the whole page.
How can I prevent the whole page from crashing when a resource does not exist? I just want a tiny error message where the resource lacks, like "Not found: Users.DetailsUserHeadline".
I also want to dynamically retrieve resources from code behind, by defining the key as a string "Users.DetailsUserHeadline" without any erros.
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i have create dynamic menu control , i have master page and login page , once the user login , i want to show the dynamic menu in my master page. below i try to call masterpage control in my child page ,but i throughs the error
Object reference not set to an instance of an object.
my master page code
public partial class MasterPage : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
public string MyProperty
{
set
{
// lblUser.Text = value;
lblUser.Text = value; // here i got the error
}
}
}
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protected void btnwork_Click(object sender, EventArgs e)
{
((MasterPage)this.Master).MyProperty = "Text changed from Sub Page";
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[Code]....
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[Code]....
If I run that code everything works out fine. The page loads and all is well. But, if I try to do the same thing to a page that uses my MasterPage.master file, I get the following error:
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Why is that? In the example code from the book (that also uses a MasterPage.master file), everything excutes and runs just fine. But in my test, I get the above error. I've tried comparing my pages to the books included source pages, but I can't find any differences.
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