在开发数据DataGrid显示时候通常会遇到自定义DataGrid的列显示,
比如经常会提到的,
如何单击一行显示某种颜色
如何点击到某个单元格不显示编辑框
如何自定义一列的显示,比如本来有个标记位flag为0,本行背景显示为白色等等,
此类问题归根到底还是要靠 DataGridTableStyle 和 System.Windows.Forms.DataGridColumnStyle 这两个类来完成.
DataGridColumnStyle 是定义一列显示的样式
DataGridTableStyle 是定义整个datagrid的实现样式.
dts.GridColumnStyles.Clear();//将column的style清除
for (int i=0;i<Boxs.Count;i++)
{
dts.GridColumnStyles.Add((DataGridTextBoxColumn)Boxs[i]);//把所有的columnstyle附加上去
}
Employee_lst.TableStyles.Add(dts);//最后把datatablestyle附加到datagrid上去
还要注意每一个columnstryl都要对应到列,否则会出错.
DatatableStyle也要对应到表.
xxx.MappingName= yyy;
--------------------------------------------------------------------------------
我们来自己创建一个DataGridColumnStyle 的子类来:
这个子类能够解决:
如何单击一行显示某种颜色
如何点击到某个单元格不显示编辑框
其实这个子类很简单,主要注意看paint是如何完成的.
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
namespace Stock
{
/** <summary>
/// ButtonColumnStyle2 的摘要说明。
/// </summary>
public class ButtonColumnStyle2 : System.Windows.Forms.DataGridColumnStyle
{
/** <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public delegate void OnClickEventHandler(object sender,int rowIndex);
public event OnClickEventHandler OnClick;
public ButtonColumnStyle2()
{
// 该调用是 Windows.Forms 窗体设计器所必需的。
InitializeComponent();
// TODO: 在 InitializeComponent 调用后添加任何初始化
Invalidate();
}
/** <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
组件设计器生成的代码#region 组件设计器生成的代码
/** <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器
/// 修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
}
#endregion
继承datagridcolumnstyle#region 继承datagridcolumnstyle
protected override void Abort(int rowNum)
{
}
protected override bool Commit(CurrencyManager dataSource, int rowNum)
{
return true;
}
// protected override void Edit(CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly)
// {
// base.Edit (source, rowNum, bounds, readOnly);
// }
//
//
//
// protected override void Edit(CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly, string instantText)
// {
//
// //base.Edit (source, rowNum, bounds, readOnly, instantText);
// }
//
protected override void Edit(CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible)
{
}
paint#region paint
protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum)
{
}
protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum, bool alignToRight)
{
}
protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum, Brush backBrush, Brush foreBrush, bool alignToRight)
{
Brush dbrush = new SolidBrush(System.Drawing.Color.FromArgb(((byte)230), ((byte)236), ((byte)238)));
int m_CurrentRow = this.DataGridTableStyle.DataGrid.CurrentRowIndex;
if (m_CurrentRow == rowNum)
{
g.FillRectangle(dbrush, bounds);
}
else
{
g.FillRectangle(Brushes.White, bounds);
}
Font font = new Font("宋体",9);
DrawText("Assign Stock",font,g,bounds,dbrush);
if(OnClick!=null)
OnClick(this,m_CurrentRow);
//base.Paint (g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
}
#endregion
protected override int GetPreferredHeight(Graphics g, object value)
{
return 20;
}
protected override Size GetPreferredSize(Graphics g, object value)
{
return new Size ();
}
protected override int GetMinimumHeight()
{
return 0;
}
protected override void SetDataGrid(DataGrid value)
{
base.SetDataGrid (value);
}
#endregion
private void DrawText(String Text,Font font,Graphics g,Rectangle bounds,Brush dbrush)
{
int xMargin,yMargin;
xMargin = 2;
yMargin = 2 ;
float penWidth = 0.5f;
float penWidth2 = 1f;
g.DrawLine(new Pen(Brushes.DarkGray,penWidth),new Point(bounds.Left+xMargin,+yMargin),new Point(bounds.Left+xMargin,bounds.Bottom-yMargin));
g.DrawLine(new Pen(Brushes.DarkGray,penWidth),new Point(bounds.Right-xMargin,+yMargin),new Point(bounds.Left+xMargin,+yMargin));
g.DrawLine(new Pen(Brushes.DimGray,penWidth2),new Point(bounds.Left+xMargin,bounds.Bottom-yMargin),new Point(bounds.Right-xMargin,bounds.Bottom-yMargin));
g.DrawLine(new Pen(Brushes.DimGray,penWidth2),new Point(bounds.Right-xMargin,+yMargin),new Point(bounds.Right-xMargin,bounds.Bottom-yMargin));
// g.FillRectangle(dbrush,bounds.Left+xMargin,+yMargin,bounds.Width-2*xMargin,bounds.Height-2*yMargin);
PointF p = new PointF(bounds.Left+2,+5);
StringFormat FontFormat = new StringFormat();
FontFormat.Alignment = System.Drawing.StringAlignment.Near;
g.DrawString(Text, font, Brushes.Black,p,FontFormat);
}
}
}
