how to StringFormat number in datagrid wpf

Question

hi there...
i need help with this
wpf

if all three number are zero must not show it
if not must show three number after

Answer 1

Here is my Demo of ValueConverter in C#:
The cs code is:

public partial class MainWindow : Window  
    {  
        public MainWindow()  
        {  
            InitializeComponent();  
            ObservableCollection<Member> memberData = new ObservableCollection<Member>()  
            {  
                new Member(){DataNumber = "150.1200"},  
                new Member(){DataNumber = "150.13699"},  
                new Member(){DataNumber = "150.110"},  
                new Member(){DataNumber = "12.000"},  
                new Member(){DataNumber = "61.333"},  
                new Member(){DataNumber = "72.100"}  
            };  
            dataGrid.DataContext = memberData;  
        }  
    }  
    public class Member  
    {  
        public string DataNumber { get; set; }         
    }  
    public class Converter : IValueConverter  
    {  
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)  
        {  
            string strNum = System.Convert.ToDouble(value.ToString()).ToString("0.000");  
            double dNum = System.Convert.ToDouble(strNum);  
            int intNum = System.Convert.ToInt32(dNum);  
            if(intNum==dNum)  
            {  
                return intNum;  
            }else  
            {  
                return dNum.ToString("0.000");  
            }  
              
        }  
  
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)  
        {  
            throw new NotImplementedException();  
        }  
    }  

The Xaml code is:

The result is:

Answer 2

Hi,
you can use ValueConverter like in following demo:

<Window x:Class="Window053"  
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"  
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"  
        xmlns:local="clr-namespace:WpfApp1.WpfApp053"  
        mc:Ignorable="d"  
        Title="Window53" Height="450" Width="800">  
  <Window.DataContext>  
    <local:ViewModel/>  
  </Window.DataContext>  
  <Window.Resources>  
    <local:ColumnConverter x:Key="conv"/>  
  </Window.Resources>  
  <Grid>  
    <DataGrid ItemsSource="{Binding View}" AutoGenerateColumns="False">  
      <DataGrid.Columns>  
        <DataGridTextColumn Header="ID" Binding="{Binding ID}"/>  
        <DataGridTextColumn Header="Col1" Binding="{Binding Col1}"/>  
        <DataGridTextColumn Header="Col2" Binding="{Binding Col2, Converter={StaticResource conv}}"/>  
      </DataGrid.Columns>  
    </DataGrid>  
  </Grid>  
</Window>  

And classes:

Result: