<DataGrid AutoGenerateColumns="False" Height="642" HorizontalAlignment="Left" Margin="131,57,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="799" CanUserAddRows="True" LoadingRow="dataGrid1_LoadingRow" GridLinesVisibility="None">
  <DataGrid.ColumnHeaderStyle >
 <Style TargetType="DataGridColumnHeader">
   <Setter Property="Height" Value="50"></Setter>
 </Style>
  </DataGrid.ColumnHeaderStyle>
  <DataGrid.Columns>
 <DataGridTextColumn Header="id" Binding="{Binding Path=id}" ElementStyle="{StaticResource dgCell}"></DataGridTextColumn>
 <DataGridTextColumn Header="name" Binding="{Binding Path=name}" ElementStyle="{StaticResource dgCell}"></DataGridTextColumn>
  </DataGrid.Columns>
</DataGrid>

2、創(chuàng)建一個(gè)數(shù)據(jù)源并綁定，此處是創(chuàng)建一個(gè)datatable

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("id", typeof(int)));
dt.Columns.Add(new DataColumn("name", typeof(string)));

for (int i = 0; i < 6; i++)
{
 DataRow dr = dt.NewRow();
 if (i == 3)
 {
   dr["id"] = DBNull.Value;
   dr["name"] = DBNull .Value ;
   dt.Rows.Add(dr);
 }
 else
 {
   dr["id"] = i;
   dr["name"] = "tom" + i.ToString();
   dt.Rows.Add(dr);
 }
}

this.dataGrid1.CanUserAddRows = false;
this.dataGrid1.ItemsSource = dt.DefaultView;

3、獲取單行

for (int i = 0; i < this.dataGrid1.Items.Count; i++)
{
 DataRowView drv = dataGrid1.Items[i] as DataRowView;
 DataGridRow row = (DataGridRow)this.dataGrid1.ItemContainerGenerator.ContainerFromIndex(i);

 if (i == 2)
 {
   row.Height = 50;
   row.Background = new SolidColorBrush(Colors.Blue);
   drv["id"] = 333;
 }

 if (drv["id"] == DBNull.Value)
 {
   row.Background = new SolidColorBrush(Colors.Green);
   row.Height = 8;
 }
}

4、獲取單元格

for (int i = 0; i < this.dataGrid1.Items.Count; i++)
{
 DataRowView drv = dataGrid1.Items[i] as DataRowView;
 DataGridRow row = (DataGridRow)this.dataGrid1.ItemContainerGenerator.ContainerFromIndex(i);
　　　　　　　　　if (i == 4)
 {
   DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
   DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(1);
   cell.Background = new SolidColorBrush(Colors.Red);
 }
}

public static T GetVisualChild<T>(Visual parent) where T : Visual
{
  T childContent = default(T);
  int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
  for (int i = 0; i < numVisuals; i++)
  {
 Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
 childContent = v as T;
 if (childContent == null)
 {
   childContent = GetVisualChild<T>(v);
 }
 if (childContent != null)
 {
   break;
 }
  }

  return childContent;
}

5、如果在項(xiàng)目中把創(chuàng)建數(shù)據(jù)源、綁定數(shù)據(jù)源、對(duì)datagrid進(jìn)行操作（改變行的顏色、高度）都寫在一個(gè)事件中，其中在取datagrid的row時(shí)出現(xiàn)錯(cuò)誤：未將對(duì)象引用設(shè)置到對(duì)象的實(shí)例。

解決的方法：

//創(chuàng)建數(shù)據(jù)源、綁定數(shù)據(jù)源
    
if (!Window.GetWindow(dataGrid1).IsVisible)
{
 Window.GetWindow(dataGrid1).Show();
}
dataGrid1.UpdateLayout();

//可以獲取某一行、某一行的單元格

相信本文所述對(duì)大家的C#程序設(shè)計(jì)有一定的借鑒作用。

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