C#重写DataGridView

 本文实例为大家分享了c#重写datagridview的实例代码，供大家参考，具体内容如下

using system;
using system.collections.generic;
using system.text;
using system.drawing;
using system.windows.forms;
using system.drawing.drawing2d;
namespace crd.winui.editors
{
  public class datagridview : system.windows.forms.datagridview
  {
    private bool _cellcoloronchange=false;
    private color cell_color = color.yellow;
    private bool shifouhuasanjiao = true;
    private color color_grid = color.fromargb(236, 233, 216);
    bool click = false;
    public datagridview()
    {
      this.setstyle(controlstyles.doublebuffer | controlstyles.allpaintinginwmpaint, true);
    }
    protected override void oncreatecontrol()
    {
      this.enableheadersvisualstyles = false;
      this.columnheadersdefaultcellstyle.backcolor = color.fromargb(236, 233, 216);
      this.columnheadersborderstyle = datagridviewheaderborderstyle.raised;
      //this.columnheadersheight = 20;
      this.columnheadersheightsizemode = datagridviewcolumnheadersheightsizemode.disableresizing;
      this.columnheadersdefaultcellstyle.alignment = system.windows.forms.datagridviewcontentalignment.middlecenter;
      this.columnheadersdefaultcellstyle.forecolor = system.drawing.systemcolors.windowtext;
      this.columnheadersdefaultcellstyle.selectionbackcolor = system.drawing.systemcolors.highlight;
      this.columnheadersdefaultcellstyle.selectionforecolor = system.drawing.systemcolors.highlighttext;
      this.rowheadersdefaultcellstyle.alignment = system.windows.forms.datagridviewcontentalignment.middleleft;
      this.rowheadersdefaultcellstyle.backcolor = color.fromargb(236, 233, 216);
      this.rowheadersdefaultcellstyle.forecolor = system.drawing.systemcolors.windowtext;
      this.rowheadersborderstyle = system.windows.forms.datagridviewheaderborderstyle.raised;
      this.defaultcellstyle.selectionbackcolor = color.darkblue;
      this.defaultcellstyle.selectionforecolor = color.darkslateblue;
      this.rowheaderswidthsizemode = datagridviewrowheaderswidthsizemode.disableresizing;
      //this.gridcolor = color.silver;//表格点击后颜色 表格线颜色
      this.backgroundcolor = system.drawing.systemcolors.window;
      this.borderstyle = system.windows.forms.borderstyle.fixed3d;
      this.allowusertoordercolumns = true;
      this.autogeneratecolumns = true;
      base.oncreatecontrol();
    }
    color defaultcolor;
    //移到单元格时的颜色
    protected override void oncellmousemove(datagridviewcellmouseeventargs e)
    {
      base.oncellmousemove(e);
      try
      {
        if (_cellcoloronchange)
          rows[e.rowindex].defaultcellstyle.backcolor = cell_color;
      }
      catch (exception)
      {
      }
    }
    //进入单元格时保存当前的颜色
    protected override void oncellmouseenter(datagridviewcelleventargs e)
    {
      base.oncellmouseenter(e);
      try
      {
        if (_cellcoloronchange)
          defaultcolor = rows[e.rowindex].defaultcellstyle.backcolor;
      }
      catch (exception)
      {
      }
    }
    //离开时还原颜色
    protected override void oncellmouseleave(datagridviewcelleventargs e)
    {
      base.oncellmouseleave(e);
      try
      {
        if (_cellcoloronchange)
          rows[e.rowindex].defaultcellstyle.backcolor = defaultcolor;
      }
      catch (exception)
      {
      }
    }
    public bool cellcoloronchange
    {
      get
      {
        return _cellcoloronchange;
      }
      set
      {
        _cellcoloronchange = value;
      }
    }
    public color defaultcolorset
    {
      get
      {
        return cell_color;
      }
      set
      {
        cell_color = value;
      }
    }
    public bool shifouhua_sanjiao
    {
      get
      {
        return shifouhuasanjiao;
      }
      set
      {
        shifouhuasanjiao = value;
      }
    }
    public color content_grid_color
    {
      get
      {
        return color_grid;
      }
      set
      {
        color_grid = value;
      }
    }
    private void initializecomponent()
    {
      ((system.componentmodel.isupportinitialize)(this)).begininit();
      this.suspendlayout();
      // 
      // datagridview
      // 
      //this.rowtemplate.height = 17;
       
      ((system.componentmodel.isupportinitialize)(this)).endinit();
      this.resumelayout(false);
    }
    //rowpostpaint
    protected override void onrowpostpaint(datagridviewrowpostpainteventargs e)
    {
      
      if (shifouhuasanjiao)
      {
        using (solidbrush b = new solidbrush(color.black))
        {
          image image = global::crd.winui.properties.resources.未标题_1;
          //e.graphics.drawstring("►", e.inheritedrowstyle.font, b, e.rowbounds.location.x + 5, e.rowbounds.location.y + 4);
          //e.graphics.drawimageunscaled(image, e.rowbounds.location.x + 1, e.rowbounds.location.y + 2, 8, 13);
          if (click)
          if (e.rowindex == this.currentrow.index) {
            e.graphics.drawimageunscaled(image, e.rowbounds.location.x + 1, e.rowbounds.location.y + 2, 8, 13);
          }
           
        }
      }
       
       
      base.onrowpostpaint(e);
    }
    
    
    protected override void onrowprepaint(datagridviewrowprepainteventargs e)
    {
      if (shifouhuasanjiao)
      {
        using (solidbrush b = new solidbrush(color.black))
        {
          image image = global::crd.winui.properties.resources.未标题_1;
          //e.graphics.drawstring("►", e.inheritedrowstyle.font, b, e.rowbounds.location.x + 5, e.rowbounds.location.y + 4);
           //e.graphics.drawimageunscaled(image, e.rowbounds.location.x + 1, e.rowbounds.location.y + 2, 8, 13);
        }
      }
      base.onrowprepaint(e);
    }
    protected override void oncellclick(datagridviewcelleventargs e)
    {
      if (e.rowindex > -1&&this.currentrow.index == e.rowindex )
      {
        click = true;
      }
      base.oncellclick(e);
    }
    protected override void oncellpainting(datagridviewcellpaintingeventargs e)
    {
      base.oncellpainting(e);
       
      solidbrush b = new solidbrush(color.fromargb(236, 233, 216));
      pen whitepen = new pen(color_grid, 1);
      if (e.columnindex == -1 && e.rowindex == -1)
      {
        using (lineargradientbrush brush = new lineargradientbrush(e.cellbounds, color.gray,
          color.gray, lineargradientmode.forwarddiagonal))
        {
          e.graphics.fillrectangle(b, e.cellbounds);
          rectangle border = e.cellbounds;
          border.offset(new point(-1, -1));
          e.graphics.drawrectangle(pens.gray, border);
        }
        e.paintcontent(e.cellbounds);
        e.handled = true;
      }
      else if (e.rowindex == -1)
      {
        //标题行
        using (lineargradientbrush brush = new lineargradientbrush(e.cellbounds, color.silver,
          color.silver, lineargradientmode.vertical))
        {
          e.graphics.fillrectangle(b, e.cellbounds);
          rectangle border = e.cellbounds;
          border.offset(new point(-1, -1));
          e.graphics.drawrectangle(pens.silver, border);
          //e.graphics.drawrectangle(pens.black, border.x + 1, border.y + 1, border.width - 1, border.height - 1);
        }
        e.paintcontent(e.cellbounds);
        e.handled = true;
      }
      else if (e.columnindex == -1)
      {
        //标题列
        using (lineargradientbrush brush = new lineargradientbrush(e.cellbounds, color.silver,
          color.silver, lineargradientmode.horizontal))
        {
           
          e.graphics.fillrectangle(b, e.cellbounds);
          rectangle border = e.cellbounds;
          border.offset(new point(-1, -1));
          e.graphics.drawrectangle(pens.silver, border);
          //e.graphics.drawrectangle(pens.black, border.x+1,border.y+1,border.width-1,border.height-1);
          e.graphics.drawstring("△", font,b,e.cellbounds.x,e.cellbounds.y);
        }
        e.paintcontent(e.cellbounds);
        e.handled = true;
      }
      else
      {
        //color.fromargb(193, 193, 193)
        rectangle border = e.cellbounds;
        border.offset(new point(-1, -1));
 
        e.graphics.drawrectangle(whitepen, border);
      }
    }
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助。