.NET Tips : DataGrid中由某列的值设定行的颜色

来源：互联网发布：用java编写计算器界面编辑：程序博客网时间：2024/05/21 09:50

今天真是的,又被界面搞的晕头转向.

为了实现.Net window DataGrid 的某一行可以根据该行某列的值的内容设定该行颜色的功能.

先贴一个连接,里面有DataGrid很多功能扩充的解决方案Windows Forms Datagrid

不过没有我这个需求的解决方案,最后终于还是在同事的帮助下搞定了.

由某一个单元格的值设定该单元格的颜色的实现我就不贴了,上面的连接里面有解决方案.
下面是由某列的值设定整行颜色的一个解决方案. 关键是在定制的DataGridTextBoxColumn里面添加一个DataView的属性,另外重载Paint() .?
在使用DataGridTextBoxColumn的时候,将DataGrid绑定的DataView赋值给它.

public?class public class DataGridColoredTextBoxColumn : DataGridTextBoxColumn
?{
???? private? System.Data.DataView m_bindDataView;
??? ?public?DataView BindingDataView
??? {
??????? get
??????? {
???????????? return m_bindDataView;
??????? }
??????? set
??????? {
??????????? m_bindDataView = value;
???? }
??}

??protected override void Paint(System.Drawing.Graphics g,
???System.Drawing.Rectangle bounds, System.Windows.Forms.CurrencyManager
???source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush
???foreBrush, bool alignToRight)
??{
????? // the idea is to conditionally set the foreBrush and/or backbrush
????? // depending upon some crireria on the cell value
????? // Here, we color anything that begins with a letter higher than 'F'
????? try
????? {
??????????? //从DataView中取值，"ItemType"为行的名称
????????????string colValue = this.BindingDataView[rowNum]["ItemType"].ToString();?????
?? ???????? char val = colValue[0];

??????????? if( val > 'F' ) //如果首字母大于 'F'
??????????? {
???????????????? backBrush = new SolidBrush(Color.BlueViolet );
???????????????? foreBrush = new SolidBrush(Color.White);
?????????? ?}
??? ?? }
????? catch(Exception ex)
????? {
????????? //empty catch
????? }
????? finally
????? {
???????? ?// make sure the base class gets called to do the drawing with
???????? // the possibly changed brushes
???????? base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
????? }
?? }?
?}

使用的例子
?? DataGridColoredTextBoxColumn colExceptionType = new DataGridColoredTextBoxColumn();
???colItemType.BindingDataView = dtOrderItem.DefaultView; //将table的view赋值
???colItemType.HeaderText =“ItemType”;
???colItemType.MappingName = “ItemType“;
???colItemType.Width = 90;
???colItemType.NullText = "";
???tablestyle.GridColumnStyles.Add(colItemType);