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c#wpfdatagrid
Nick
Nick

Reputation: 636

How to access DisplayMember from within a method of the same class?

I have a Class Data which has a protomember ReportName defined with a slightly different display name so that the grid column headers are more meaningful .

Now i am implementing IDataErrorInfo to this class to display an error message to the end user saying 'Report Name cannot be null' while saving . So how do i access the display member attribute of ReportName in a private method of the same class?

Class Data
{        
     [ProtoMember(1), DefaultValue(null), DisplayName("Report Name")]
     public string ReportName { get; set; }

     //Check if the reportname was entered
     private void CheckReportName()
     {
     //code to check reportname and generate the errormessage containing the colheader to be sent to grid 
     }
}

Ho

Upvotes: 0

Views: 74

Answers (2)

Dan Bryant
Dan Bryant

Reputation: 27515

Given that Reflection already requires a 'magic string' for the property name to look up the value, you might consider something like this instead:

class Data
{        
    [ProtoMember(1), DefaultValue(null), DisplayName(DisplayNames.ReportName)]
    public string ReportName { get; set; }

    //Check if the reportname was entered
    private void CheckReportName()
    {
    //code to check reportname and generate the errormessage containing the colheader to be sent to grid 
    }

    private static class DisplayNames
    {
        public const string ReportName = "Report Name";
    }
}

This executes faster than the Reflection-based approach and (more importantly) it avoids using a hard-coded property name for getting the property to find the attribute.

Upvotes: 0

Alon Gubkin
Alon Gubkin

Reputation: 57129

You can use reflection:

var displayName = this.GetType()
    .GetProperty("ReportName")
    .GetCustomAttributes(false)
    .OfType<DisplayNameAttribute>()
    .First()
    .DisplayNameValue;

Upvotes: 1

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