propertygrid with Range

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Hi,
i am binding a class to a propertygrid.
Now i will manipulate the propertygrid via attributes.

sample:

class PDFSettings
{
[Range(1,100)]
[DefaultValue(85)]
public int PDFJPEGQUALITY { get; set; }
}

The DefaultValue-Attribute works.

But the Range-Attribute doesen´t work, if I input a non valid value (-1) into my propertygrid nothing happends.

what make i wrong?

Br,

Benny

Posted 19-Apr-15 22:43pm

BoySetsFire

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Comments

BillWoodruff 20-Apr-15 5:19am

Are you using the System.ComponentModel.DataAnnotations namespace ? What makes you think the PropertyGrid "knows" anything about your custom Attribute ? Show the code for your Attribute(s).

BoySetsFire 20-Apr-15 6:50am

Hi Bill!

Thx for your answer!!!

This is my code :)

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel.DataAnnotations;
using System.Reflection;
using System.Configuration;

namespace PropertyGrid1
{
public partial class Form1 : Form
{

private void Form1_Load(object sender, EventArgs e)
{
PDFSettings settings = new PDFSettings();
propertyGrid1.SelectedObject = settings;
}
}

class PDFSettings
{
[Range(1,100)]
[DefaultValue(85)]
public int PDFJPEGQUALITY { get; set; }
}

BillWoodruff 20-Apr-15 8:18am

Please add tags to your original post that indicate whether this is an ASP.NET or ASP.MVC project. If this is ASP: what PropertyGrid are you using: the one on CodePlex which is an extension of the CodeProject article by Leppie ?

Please add your code and comments to your original post, and use the CodeProject editor to format the code properly.

Please note that I have not had any experience using the System.ComponentModel.DataAnnotations namespace , or working with an ASP.NET application. I do have experience using custom Attributes and the Property Grid in WinForms however.

I repeat my question: why do you think the PropertyGrid control should use/respond-to your custom Attribute in any way ?

I note that you do not show your code for the custom Attribute as I suggested. You also show no use of the MetaDataType Attribute.

And you don't show code that indicates you are subscribing to any of the Property Grid's events.

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