how to make checkbox check and uncheck wpf

Question

I have taken checkbox in datagrid

<DataTemplate>
  <CheckBox x:Name="chkActive" IsChecked="{Binding Active, Mode=TwoWay}" 
    Style="{StaticResource checkboxStyleNormal}" IsEnabled="True"/>
 </DataTemplate>

and binding the datagrid

 datagrid1.ItemSource = dtData.DefaultView;

In datatable I am getting Active as 0 and 1, I want to show my check box checked when Active = 0

Grid is binding but I am unable to bind checkbox.

Some one please tell me how to show checkbox check/uncheck based on my condition.

Have you set the context for your view? Have you implemented the `INotifiyPropertyChanged` interface on your object? Is `Active` a boolean type? — ChrisF, Dec 28 '12 at 11:35
I'm assuming you meant "_getting Active as zero and one_" so I edited that line too. — gideon, Dec 28 '12 at 11:36

score 5 · Answer 1 · edited May 23 '17 at 11:59

IsChecked expects a boolean value (true/false) but the table contains a numeric type. You need to add a ValueConverter to the binding statement that will convert the numeric value to a boolean value.

Check How to bind a boolean to a combobox in WPF for the inverse case (convert an bool to an int). In your case, the ValueConverter should be:

public class NumToBoolConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((int)value == 1);   
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (bool)value ? 1 : 0;
    }
}

}

UPDATE

This post has a NumToBoolConverter that also does type and null checking:

public class NumToBoolConverter : IValueConverter
{

    #region IValueConverter Members

    public object Convert(object value, Type targetType, 
        object parameter, System.Globalization.CultureInfo culture)
    {
        if (value!=null && value is int )
        {
            var val = (int)value;
            return (val==0) ? false : true;
        }
        return null;

    }

    public object ConvertBack(object value, Type targetType, 
        object parameter, System.Globalization.CultureInfo culture)
    {
        if (value!=null && value is bool )
        {
            var val = (bool)value;
            return val ? 1 : 0;
        }
        return null;
    }

    #endregion
}

I am using UserControl for my Design. how can I use windows.resource — Rocky, Dec 28 '12 at 12:03
Replace UserControl.Resource for Windows.Resource. Resource is a parameter of its parent object so you need to specify the parent's type, just as you do with DataGrid.XYZ — Panagiotis Kanavos, Dec 28 '12 at 12:14

score 0 · Answer 2 · edited Nov 27 '16 at 21:25

0

Try this if it helps:

Create a column derived from DataGridBoolColumn
Override the GetColumnValueAtRow (and SetColumnValueAtRow if you want your column to be editable)
Make these methods call the inherited implementations to work with the datasource, but do some pre-/post-processing to convert 0 and 1 to "false" and "true" respectively.

edited Nov 27 '16 at 21:25

mkj

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answered Dec 28 '12 at 11:49

Sumit Pannu

177
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score 0 · Accepted Answer · answered Jan 04 '13 at 12:29

0

I tried by modify my query before binding to the datagrid and added "case" to my query

Select ID ,DESC, CASE WHEN [STATUS] = 0 THEN 'True' WHEN [STATUS] = 1 THEN 'False' END AS  [Active], ORDER [Order] from tbldesc

its working fine for me.

answered Jan 04 '13 at 12:29

Rocky

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how to make checkbox check and uncheck wpf

3 Answers3