关于wpf中datagrid动态设置单元格背景问题！

[corywind]

最近新接个项目，用wpf做的系统从来没有做过，画面是xaml的文件，后台用c#太困难了，找个属性都找不到
现在需要在前台DATAGRID中根据数据动态设置单元格的背景属性，查了半天，光知道是需要绑定的，但是具体步骤还是不清楚
无从下手阿，
哪位高手做过给指条名路吧，谢谢！

[lizhibin11]

或者把XAML写为这样，可以在同一行也有不同的颜色，如有帮助请尽快结帖，超过两千分够了五个三角就不在这里浪费时间了。
[code=XML]
<Window x:Class="WpfApplication11.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication11"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<local:ConVerter x:Key="Converter" />
</Window.Resources>
<DataGrid AutoGenerateColumns="False" Height="310" Name="dataGrid1" Width="346" ItemsSource="{Binding}">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Path=A}" Header="Header1">
<DataGridTextColumn.CellStyle>
<Style TargetType="DataGridCell" >
<Setter Property="Background" Value="{Binding Path=A, Converter={StaticResource Converter}}"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
<DataGridTextColumn Binding="{Binding Path=B}" Header="Header2">
<DataGridTextColumn.CellStyle>
<Style TargetType="DataGridCell" >
<Setter Property="Background" Value="{Binding Path=B, Converter={StaticResource Converter}}"/>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
</Window>
/code]

[lizhibin11]

<Window x:Class="WpfApplication11.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication11"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <local:ConVerter x:Key="Converter" />
    </Window.Resources>
    <DataGrid AutoGenerateColumns="False" Height="310" Name="dataGrid1" Width="346" ItemsSource="{Binding}">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Path=A}" Header="Header1">
                <DataGridTextColumn.CellStyle>
                    <Style TargetType="DataGridCell" >
                        <Setter Property="Background" Value="{Binding Path=A, Converter={StaticResource Converter}}"/>
                    </Style>
                </DataGridTextColumn.CellStyle>
            </DataGridTextColumn>
            <DataGridTextColumn Binding="{Binding Path=B}"  Header="Header2">
                <DataGridTextColumn.CellStyle>
                    <Style TargetType="DataGridCell" >
                        <Setter Property="Background" Value="{Binding Path=B, Converter={StaticResource Converter}}"/>
                    </Style>
                </DataGridTextColumn.CellStyle>
            </DataGridTextColumn>
        </DataGrid.Columns>
    </DataGrid>
</Window>

[corywind]

代码层是分别的两个类文件吗
绑定的时候就能自动识别这两个类?
已经有点明白了，绑定这里还稍微有点晕
高手再给解释一下

[lizhibin11]

xmlns:local="clr-namespace:WpfApplication11"
表明命名空间
<local:ConVerter x:Key="Converter" />
该命名空间下的类名,然后定义一个键值

[lizhibin11]

因为整个上下文的数据源都是datatable，所以path=A或B在整个上下文中都是起作用的

[corywind]

我这个是web的，不是winform的没有datatable,只有datacontext=model

[lizhibin11]

唉,一样的,那是另一个问题了,是数据源类型的问题.
我帮不了你了,你再等高手吧.

[corywind]

这个是我刚刚写的前台
<my:DataGrid ItemsSource="{Binding}" Grid.Column="3" Grid.Row="3" Height="120" HorizontalAlignment="Left" Margin="1,0,0,0" Name="dataGrid1" VerticalAlignment="Bottom" Width="1000" Grid.ColumnSpan="5" SelectionMode="Single" SelectionUnit="Cell">
<my:DataGrid.Columns>
<my:DataGridTextColumn Header="週間" Width="80" Binding="{Binding Path=Name}">
<my:DataGridTextColumn.CellStyle>
<Style TargetType = "my:DataGridCell">
<Setter Property="Background" Value="{Binding Path=Name, Converter={StaticResource Converter}}">

</Setter>
</Style >
</my:DataGridTextColumn.CellStyle>
</my:DataGridTextColumn>

</my:DataGrid.Columns>
</my:DataGrid>

这个是后台的新建的CLASS文件
public class ConVerter : IValueConverter
{

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if ((int)value > 10)
{
return Brushes.Blue;
}
else
{
return Brushes.Green;
}
}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}

[anbin0814]

  <my:DataGrid Grid.Row="1" AutoGenerateColumns="False" ItemsSource="{Binding}" HorizontalAlignment="Center" VerticalAlignment="Top" Name="dataGrid1" SelectionMode="Single"
                         Height="342" Width="780" RowBackground="#FFDFF0F4" AlternatingRowBackground="#FFD0DEE6" ColumnHeaderHeight="25" RowHeight="25" RowHeaderWidth="0"
                         HorizontalGridLinesBrush="#FF7E9AB0" VerticalGridLinesBrush="#FF7E9AB0" Background="White" CanUserAddRows="False" CanUserDeleteRows="False"
                         CanUserResizeRows="False" MouseDoubleClick="dataGrid1_MouseDoubleClick">
                <my:DataGrid.ColumnHeaderStyle>
                    <Style TargetType="my:DataGridColumnHeader" >
                        <Setter Property="Background" Value="#FFBFCFDC"/>
                        <Setter Property="SeparatorVisibility" Value="Visible" />
                        <Setter Property="SeparatorBrush" Value="Black" />
                    </Style>
                </my:DataGrid.ColumnHeaderStyle>
                <my:DataGrid.Columns>
                    <my:DataGridTemplateColumn Header="选择" Width="0.03*">
                        <my:DataGridTemplateColumn.CellTemplate>
                            <DataTemplate>
                                <CheckBox Name="chkPrint" IsChecked="{Binding IsChecked}" Click="chkPrint_Click"></CheckBox>
                            </DataTemplate>
                        </my:DataGridTemplateColumn.CellTemplate>
                    </my:DataGridTemplateColumn>
                    <my:DataGridTextColumn Header="序号" IsReadOnly="True" Binding="{Binding Order}" Width="0.03*"/>
                    <!--<my:DataGridTextColumn Header="病区/科室" IsReadOnly="True" Binding="{Binding Col_Name}" Width="0.1*"/>-->
                    <my:DataGridTextColumn Header="制单时间" IsReadOnly="True" Binding="{Binding CreateTime, Converter={StaticResource DataTimeConverter}}" Width="0.14*"/>
                    <my:DataGridTextColumn Header="单据编号" IsReadOnly="True" Binding="{Binding No}" Width="0.1*"/>
                    <my:DataGridTextColumn Header="单据类型" IsReadOnly="True" Binding="{Binding TypeName}" Width="0.1*"/>
                    <my:DataGridTextColumn Header="数量" IsReadOnly="True" Binding="{Binding Quantity}" Width="0.1*"/>
                    <my:DataGridTextColumn Header="制单人" IsReadOnly="True" Binding="{Binding Handler}" Width="0.1*"/>
                </my:DataGrid.Columns>

            </my:DataGrid>

[corywind]

楼上的那个Binding="{Binding CreateTime, Converter={StaticResource DataTimeConverter}}"
这里面的DataTimeConverter是怎么倒进来的，我现在老是题是我找不到这个名字啊

[corywind]

虽然没解决问题，但是多少又明白了点，先结贴了

[lizhibin11]

谢谢你了哥们，我感激涕零了都。
不管是啥数据源，肯定都实现了IEnumerable接口，绑定方式和dataview都是一样的。

[lizhibin11]

后台写一个类继承IValueConverter，里面实现根据数据返回背景Brush，然后在xaml里面声明Resources，再将单元格背景色绑定到该资源键值。

[corywind]

能具体点有代码吗，
大概流程我清楚了，但是前台的xaml文件里面如何定义能使绑定的值只针对某一个单元格
后台代码我看网上的资料说是在model里写属性设置，但是具体怎么写啊

[lizhibin11]

<Window x:Class="WpfApplication11.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication11"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <local:ConVerter x:Key="Converter" />
    </Window.Resources>
    <DataGrid AutoGenerateColumns="False" Height="310" Name="dataGrid1" Width="346" ItemsSource="{Binding}">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Path=A}" Header="Header"  />
            <DataGridTextColumn Binding="{Binding Path=B}"  Header="Header"  />
        </DataGrid.Columns>
        <DataGrid.CellStyle>
            <Style TargetType="DataGridCell" >
                <Setter Property="Background" Value="{Binding Path=A, Converter={StaticResource Converter}}"/>
            </Style>
        </DataGrid.CellStyle>
    </DataGrid>
</Window>

    public partial class MainWindow : Window
    {
        DataTable dt = new DataTable();
        public MainWindow()
        {
            dt.Columns.Add("A",typeof(int));
            dt.Columns.Add("B",typeof(int));
            for (int i = 0; i < 20; i++)
            {
                DataRow dr = dt.NewRow();
                dr[0] = i;
                dr[1] = i + 5;
                dt.Rows.Add(dr);
            }
            dt.AcceptChanges();
            InitializeComponent();
            dataGrid1.DataContext = dt.DefaultView;
        }
    }
    public class ConVerter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if ((int)value > 10)
            {
                return Brushes.Blue;
            }
            else
            {
                return Brushes.Green;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }