DevExpress GridControl 动态创建字段及主细关系表过程

原文地址：http://hi.baidu.com/qdseashore/item/38f1153e9d0143637d034b7a

在做项目中，往往需要在查询基类模板窗口内做主细关系Grid，引用一下代码可减少工作量，只需给此过程传递主、细SQL语句以及关联的关键字段即可完成如图所示的效果:

#region 执行主细查询过程
        public void ExeQuery(string sMSql,string sDSql,string RelaitionField)
        {
            int iMCountItemNum = 0; int iDCountItemNum = 0;
            int iMSumItemNum = 0; int iDSumItemNum = 0;
            //查询。
            if (sMSql == null || sMSql == "" || sDSql == null || sDSql == "")
            {
                return;
            }

            #region 根据SQL填充主、细表
            using (OracleConnection connection = new OracleConnection(DbHelperOra.connectionString))
            {
                
                _dtQuery = new DataSet();
                try
                {
                    connection.Open();
                    OracleDataAdapter command = new OracleDataAdapter(sMSql, connection);
                    command.Fill(_dtQuery, "MA");
                    command.SelectCommand.CommandText=sDSql;
                    command.Fill(_dtQuery,"DE");
                    command.Dispose();
                }
                catch (System.Data.OracleClient.OracleException ex)
                {

                }
                finally
                {
              
                    connection.Close();
                }
            }
            #endregion

            #region 主表动态构造字段。
            try
            {
                //获取到表结构。
                if (_dtQuery.Tables["MA"].Rows.Count >= 0)
                {
                    gvMainList.Columns.Clear();
                    gvMainList.GroupSummary.Clear();
                    gvMainList.ClearGrouping();
                    //gvMainList.OptionsBehavior.Editable = true;
                    int iVisible = 0;
                    //根据表结构动态加载到GridControl控件中。
                    foreach (DataColumn _dcQuery in _dtQuery.Tables["MA"].Columns)
                    {
                        iVisible++;
                        //动态添加
                        DevExpress.XtraGrid.Columns.GridColumn gcQueryList = new DevExpress.XtraGrid.Columns.GridColumn();
                        gcQueryList.Name = "_dc" + _dcQuery.ColumnName.ToUpper();
                        gcQueryList.Caption = _dcQuery.ColumnName;
                        gcQueryList.FieldName = _dcQuery.ColumnName;

                        //数字类型
                        if ((_dcQuery.DataType.ToString().ToUpper() == "SYSTEM.DECIMAL" || _dcQuery.DataType.ToString().ToUpper() == "SYSTEM.DOUBLE") &&
                            ((gcQueryList.Caption.IndexOf("金额") >= 0) || (gcQueryList.Caption.IndexOf("价格") >= 0)
                            || (gcQueryList.Caption.IndexOf("人民币") >= 0) || (gcQueryList.Caption.IndexOf("美元") >= 0)
                            || (gcQueryList.Caption.IndexOf("单价") >= 0) || (gcQueryList.Caption.IndexOf("个") >= 0)
                            || (gcQueryList.Caption.IndexOf("件") >= 0) || (gcQueryList.Caption.IndexOf("箱") >= 0)
                            || (gcQueryList.Caption.IndexOf("数量") >= 0)) && iMSumItemNum < 1)
                        {
                            iMSumItemNum++;
                            gcQueryList.SummaryItem.FieldName = _dcQuery.ColumnName;
                            gcQueryList.SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;
                            gvMainList.GroupSummary.Add(DevExpress.Data.SummaryItemType.Sum, _dcQuery.ColumnName, null, "  小计:{0}");

                        }
                        else if ((_dcQuery.DataType.ToString().ToUpper() == "SYSTEM.DECIMAL" || _dcQuery.DataType.ToString().ToUpper() == "SYSTEM.STRING") &&
                           ((gcQueryList.Caption.IndexOf("序号") >= 0) || (gcQueryList.Caption.IndexOf("流水") >= 0)
                            || (gcQueryList.Caption.IndexOf("ID") >= 0) || (gcQueryList.Caption.IndexOf("编号") >= 0)
                            || (gcQueryList.Caption.IndexOf("箱号") >= 0) || (gcQueryList.Caption.IndexOf("尺寸") >= 0)
                            || (gcQueryList.Caption.IndexOf("序") >= 0) || (gcQueryList.Caption.IndexOf("单号") >= 0)) && iMCountItemNum < 1)
                        {
                            iMCountItemNum++;
                            gcQueryList.SummaryItem.FieldName = _dcQuery.ColumnName;
                            gcQueryList.SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Count;
                            gvMainList.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, _dcQuery.ColumnName, null, "  小计:{0}");
                        }

                        if (gcQueryList.FieldName != null && RelaitionField != null && gcQueryList.FieldName.ToUpper() != RelaitionField.ToUpper())
                        {
                            gcQueryList.VisibleIndex = iVisible;
                            gcQueryList.Visible = true;
                        }
                        else
                        {
                            gcQueryList.VisibleIndex = -1;
                            gcQueryList.Visible = false;
                        }
                        //gcQueryList.ColumnEdit.ReadOnly = true;
                        gvMainList.Columns.Add(gcQueryList);
                    }
                }
                gcMainList.MainView = gvMainList;

            }
            catch (System.Exception ex)
            {
                MsgBox.ErrorMsg("执行查询失败! 失败原因:" + ex.Message);
            }
            #endregion

            #region 子表构造字段
            try
            {
                //获取到表结构。
                if (_dtQuery.Tables["DE"].Rows.Count >= 0)
                {
                    DevExpress.XtraGrid.Views.Grid.GridView gvMainDetail = new DevExpress.XtraGrid.Views.Grid.GridView();
                   // gvMainDetail.Columns.Clear();
                   // gvMainDetail.GroupSummary.Clear();
                   // gvMainDetail.ClearGrouping();
                   // gvMainDetail.OptionsBehavior.Editable = true;

                    int iVisible = 0;
                    //根据表结构动态加载到GridControl控件中。
                    foreach (DataColumn _dcQueryDetail in _dtQuery.Tables["DE"].Columns)
                    {
                        iVisible++;
                        //动态添加
                        DevExpress.XtraGrid.Columns.GridColumn gcDetialQueryList = new DevExpress.XtraGrid.Columns.GridColumn();
                        gcDetialQueryList.Name = "_dcD" + _dcQueryDetail.ColumnName.ToUpper();
                        gcDetialQueryList.Caption = _dcQueryDetail.ColumnName;
                        gcDetialQueryList.FieldName = _dcQueryDetail.ColumnName;

                        //数字类型
                        if ((_dcQueryDetail.DataType.ToString().ToUpper() == "SYSTEM.DECIMAL" || _dcQueryDetail.DataType.ToString().ToUpper() == "SYSTEM.DOUBLE") &&
                            ((gcDetialQueryList.Caption.IndexOf("金额") >= 0) || (gcDetialQueryList.Caption.IndexOf("价格") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("人民币") >= 0) || (gcDetialQueryList.Caption.IndexOf("美元") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("单价") >= 0) || (gcDetialQueryList.Caption.IndexOf("个") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("件") >= 0) || (gcDetialQueryList.Caption.IndexOf("箱") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("数量") >= 0)) && iDSumItemNum < 1)
                        {
                            iDSumItemNum++;
                            gcDetialQueryList.SummaryItem.FieldName = _dcQueryDetail.ColumnName;
                            gcDetialQueryList.SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Sum;
                            gvMainDetail.GroupSummary.Add(DevExpress.Data.SummaryItemType.Sum, _dcQueryDetail.ColumnName, null, "  小计:{0}");

                        }
                        else if ((_dcQueryDetail.DataType.ToString().ToUpper() == "SYSTEM.DECIMAL" || _dcQueryDetail.DataType.ToString().ToUpper() == "SYSTEM.STRING") &&
                           ((gcDetialQueryList.Caption.IndexOf("序号") >= 0) || (gcDetialQueryList.Caption.IndexOf("流水") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("ID") >= 0) || (gcDetialQueryList.Caption.IndexOf("编号") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("箱号") >= 0) || (gcDetialQueryList.Caption.IndexOf("尺寸") >= 0)
                            || (gcDetialQueryList.Caption.IndexOf("序") >= 0) || (gcDetialQueryList.Caption.IndexOf("单号") >= 0)) && iDCountItemNum < 1)
                        {
                            iDCountItemNum++;
                            gcDetialQueryList.SummaryItem.FieldName = _dcQueryDetail.ColumnName;
                            gcDetialQueryList.SummaryItem.SummaryType = DevExpress.Data.SummaryItemType.Count;
                            gvMainDetail.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, _dcQueryDetail.ColumnName, null, "  小计:{0}");
                        }

                        if (gcDetialQueryList.FieldName != null && RelaitionField != null && gcDetialQueryList.FieldName.ToUpper() != RelaitionField.ToUpper())
                        {
                            gcDetialQueryList.VisibleIndex = iVisible;
                            gcDetialQueryList.Visible = true;
                        }
                        else
                        {
                            gcDetialQueryList.VisibleIndex = -1;
                            gcDetialQueryList.Visible = false;
                        }
                        //gcDetialQueryList.ColumnEdit.ReadOnly = true;
                        
                       gvMainDetail.Columns.Add(gcDetialQueryList);

                    }

                    gcMainList.ViewCollection.Add(gvMainDetail);
                }

            }
            catch (System.Exception ex)
            {
                MsgBox.ErrorMsg("执行查询失败! 失败原因:" + ex.Message);
            }
            #endregion

            #region 建立关系并填充数据源
           _dtQuery.Relations.Add("RMD", _dtQuery.Tables["MA"].Columns[RelaitionField], _dtQuery.Tables["DE"].Columns[RelaitionField], false);
            gcMainList.DataSource = _dtQuery.Tables["MA"];
            gvMainList.BestFitColumns();
            #endregion
        }
        #endregion

效果如图: