最常用的DevExpress Winform 4个代码片段

一 、GridControl的删除操作

private void rILinkEditInfoDel_Click(object sender, EventArgs e)
{
     if (XtraMessageBox.Show("请确定是否删除当前记录？", "警告",MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
     {
         DataRow row =gvInfos.GetDataRow(gvInfos.FocusedRowHandle);
         delByCode(row["Code"].ToString());
         XtraMessageBox.Show("操作成功！");
     }
}

二、绑定非数据表中列

Hashtable ht = new Hashtable();

private void gridView6_CustomUnboundColumnData(object sender, DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgse)
{
     GridView View = sender as GridView;
     if (e.RowHandle >= 0)
     {
         object needAlert =View.GetRowCellValue(e.RowHandle, View.Columns["needAlert"]);
         if (needAlert != null &needAlert != DBNull.Value && needAlert.ToString().Trim() !="0" & View.GetRowCellValue(e.RowHandle,View.Columns["Value"]) != DBNull.Value)
         {
            decimal AverValue = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle,View.Columns["Value"]));
             objectMinValue = View.GetRowCellValue(e.RowHandle,View.Columns["MinValue"]);
             objectMaxVlaue = View.GetRowCellValue(e.RowHandle,View.Columns["MaxValue"]);
             if(MinValue != DBNull.Value & MinValue != null & MaxVlaue.ToString() !="" & MaxVlaue != DBNull.Value && MaxVlaue != null &MaxVlaue.ToString() != "")
             {
                decimal gridColumn2 = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle,View.Columns["MinValue"]));
                decimal gridColumn1 = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle,View.Columns["MaxValue"]));
                if (gridColumn2 > AverValue || AverValue > gridColumn1)
                {
                    if (!ht.ContainsKey("pic"))
                        ht.Add("pic", GetImage(1));
                    e.Value = ht["pic"];
                }
             }
         }
     }
}

/// 

/// 由资源文件获取图片
/// 
/// 
/// 
byte[] GetImage(int key)
{
     Image img =DevExpress.Utils.Controls.ImageHelper.CreateImageFromResources(string.Format("RiverSys.Resources.{0}.gif",key.ToString()), typeof(RiverInfos).Assembly);
     returnDevExpress.XtraEditors.Controls.ByteImageConverter.ToByteArray(img,ImageFormat.Gif);
}

/// 

/// 动态根据条件设置行样式
/// 
/// 
/// 
private void gridView6_RowStyle(object sender,DevExpress.XtraGrid.Views.Grid.RowStyleEventArgs e)
{
     GridView View = sender as GridView;
     if (e.RowHandle >= 0)
     {
         object needAlert =View.GetRowCellValue(e.RowHandle, View.Columns["needAlert"]);
         if (needAlert != null &needAlert != DBNull.Value && needAlert.ToString().Trim() !="0" & View.GetRowCellValue(e.RowHandle,View.Columns["Value"]) != DBNull.Value)
         {
            decimal AverValue = Convert.ToDecimal(View.GetRowCellValue(e.RowHandle, View.Columns["Value"]));
             objectMinValue = View.GetRowCellValue(e.RowHandle,View.Columns["MinValue"]);
             objectMaxVlaue = View.GetRowCellValue(e.RowHandle,View.Columns["MaxValue"]);
             if(MinValue != DBNull.Value & MinValue != null & MaxVlaue.ToString() !="" & MaxVlaue != DBNull.Value && MaxVlaue != null &MaxVlaue.ToString() != "")
             {
                decimal gridColumn2 = Convert.ToDecimal(MinValue);
                decimal gridColumn1 = Convert.ToDecimal(MaxVlaue);
                if (gridColumn2 > AverValue || AverValue > gridColumn1)
                {
                    e.Appearance.ForeColor = Color.Red;
                    e.Appearance.BackColor = Color.LightGray;
                }
             }
         }
     }
}

三、GridControl 中颜色选择控件

private void gvMapColor_CustomUnboundColumnData(object sender,DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e)
{
     GridView view = sender as GridView;
     DataView dv = view.DataSource as DataView;
     if (e.IsGetData)
     {
         string strVal =dv[e.ListSourceRowIndex]["Color"].ToString();
         if (strVal != "")
         {
            //e.Value = DevExpress.Utils.StyleLayout.ColorFromString(strVal);
            e.Value = Common.HexToColor(strVal);
         }
     }
     else
     {
         //Color colorVal =DevExpress.Utils.StyleLayout.ColorFromString(e.Value.ToString());
         Color colorVal =(Color)e.Value;
        dv[e.ListSourceRowIndex]["Color"] =Common.RGB_HEX(colorVal.ToArgb());
     }
}

四、关于 GridControl 验证示例

private void gvMapColor_CustomUnboundColumnData(object sender,DevExpress.XtraGrid.Views.Base.CustomColumnDataEventArgs e)
{
     GridView view = sender as GridView;
     DataView dv = view.DataSource as DataView;
     if (e.IsGetData)
     {
         string strVal =dv[e.ListSourceRowIndex]["Color"].ToString();
         if (strVal != "")
         {
            //e.Value = DevExpress.Utils.StyleLayout.ColorFromString(strVal);
            e.Value = Common.HexToColor(strVal);
         }
     }
     else
     {
         //Color colorVal =DevExpress.Utils.StyleLayout.ColorFromString(e.Value.ToString());
         Color colorVal =(Color)e.Value;
        dv[e.ListSourceRowIndex]["Color"] =Common.RGB_HEX(colorVal.ToArgb());
     }
}

四、关于 GridControl 验证示例

/**//// 

/// 初始化GridView，绑定数据
/// 
/// 
private void GridViewBindData(string parentId)
{
this.gridView1.Columns.Clear();
this.FDs= areaSetupActionHelper.getDsRegionByParentId(parentId);
this.gridCArea.DataSource =this.FDs.Tables[0].DefaultView;

    this.gridView1.Columns["id"].VisibleIndex =-1;
    this.gridView1.Columns["childCounts"].VisibleIndex= -1;

    this.gridView1.Columns["reg_id"].Caption ="区划编号";
    this.gridView1.Columns["reg_name"].Caption ="区划名称";
    this.gridView1.Columns["parent_id"].Caption ="父区划编号";
    this.gridView1.Columns["reg_desc"].Caption ="区划描述";
    this.gridView1.Columns["parent_id"].ImageIndex =1;
    this.gridView1.Columns["reg_desc"].ImageIndex = 0;

    RepositoryItemTextEdit textEditReg_Id = newRepositoryItemTextEdit();
    textEditReg_Id.Mask.EditMask =parentId+"\\d{2,3}";
    textEditReg_Id.Mask.MaskType =DevExpress.XtraEditors.Mask.MaskType.Regular;

    this.gridView1.Columns["reg_id"].ColumnEdit =textEditReg_Id;

    this.gridView1.Columns["reg_desc"].ColumnEdit= new RepositoryItemMemoExEdit();

    TreeListNode node =this.treelArea.FocusedNode.ParentNode;
    string fid =node==null?"0":node.GetValue("RegID").ToString().Trim();
    DataSet ds =areaSetupActionHelper.getDsRegionByParentId(fid);
    RepositoryItemLookUpEdit lookUEParent_Id = newRepositoryItemLookUpEdit();
    lookUEParent_Id.Columns.Add(newLookUpColumnInfo("reg_id", 40, "区划编号"));
    lookUEParent_Id.Columns.Add(newLookUpColumnInfo("reg_name", 40, "区划名称"));
    lookUEParent_Id.DataSource = ds.Tables[0].DefaultView;
    lookUEParent_Id.ValueMember = "reg_id";
    lookUEParent_Id.DisplayMember = "reg_id";
    this.gridView1.Columns["parent_id"].ColumnEdit =lookUEParent_Id;
}
/**//// 

/// gridView单元格验证的相关处理程序
/// 
/// 
/// 
private void gridView1_ValidatingEditor(objectsender, DevExpress.XtraEditors.Controls.BaseContainerValidateEditorEventArgs e)
{
if (e.Valid == false&this.gridView1.FocusedColumn.FieldName =="reg_id")
{
      e.ErrorText = "区划编号不合法！\n应为父区划编号加2～3位数据组成！";   
    }
    if (this.gridView1.FocusedColumn.FieldName =="reg_name")
    {     
     Regex reg=new Regex(@"[\u4e00-\u9fa5]{1,20}");
     Match m=reg.Match(e.Value.ToString().Trim());
     if (m.Length != e.Value.ToString().Trim().Length)
     {
      e.Valid = false;
      e.ErrorText = "区划名称应为汉字\n长度为1至20";
     }
    }
}

private void gridView1_InvalidValueException(objectsender, InvalidValueExceptionEventArgs e)
{
    if (MyDialog.Alert("　您所填写的内容不符合规则\n　要放弃您刚才对此项所做的更改吗？", "您所编辑的内容不符合规则", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) ==DialogResult.Yes)
    {
     e.ExceptionMode = ExceptionMode.Ignore;
    }
}

/**//// 

/// gridView行验证的相关处理程序
/// 
private void gridView1_ValidateRow(objectsender, DevExpress.XtraGrid.Views.Base.ValidateRowEventArgs e)
{
string regid = this.gridView1.GetRowCellValue(e.RowHandle,"reg_id").ToString().Trim();
string regName = this.gridView1.GetRowCellValue(e.RowHandle,"reg_name").ToString().Trim();
if ( regid.Length < 1)
{
     e.Valid = false;
    this.gridView1.SetColumnError(this.gridView1.Columns["reg_id"],"请填写区划编号!",DevExpress.XtraEditors.DXErrorProvider.ErrorType.Default);
      // e.ErrorText = "区划名称不能为空!";
    }
    if (regName.Length < 1)
    {
     e.Valid = false;
    this.gridView1.SetColumnError(this.gridView1.Columns["reg_name"],"区划名称不能为空!",DevExpress.XtraEditors.DXErrorProvider.ErrorType.Default);
    }
}

private void gridView1_InvalidRowException(object sender,DevExpress.XtraGrid.Views.Base.InvalidRowExceptionEventArgs e)
{

    if (e.RowHandle >= 0)
    {
     if (this.gridView1.GetRowCellValue(e.RowHandle,this.gridView1.Columns["reg_id"]).ToString().Trim() == ""|| this.gridView1.GetRowCellValue(e.RowHandle,this.gridView1.Columns["reg_name"]).ToString().Trim() =="")
     {
      if (MyDialog.Alert(" 　您所填写的内容不符合规则\n　要放弃您刚才对此项所做的更改吗？","您所编辑的内容不符合规则", MessageBoxButtons.YesNo,MessageBoxIcon.Warning) == DialogResult.Yes)
      {
       e.ExceptionMode = ExceptionMode.Ignore;
      }
      else
      {
       e.ExceptionMode = ExceptionMode.NoAction;
      }
     }
    }
    else
    {
     e.ExceptionMode = ExceptionMode.Ignore;
    }
}

本文来源：慧都学院-企业级IT培训平台