DevExpress控件之GridControl、GridView

GridControl对应标准WinForm里的GridView，相当于是一个控件，里面包含多个GridView也可以放其它的控件

禁止修改
gridView1.OptionsBehavior.Editable = false;

一、

去掉"Drag a column header here to group by that column"一栏

gridView1.OptionsView.ShowGroupPanel = false;

只想隐藏这句话，保留这个头部，设置Appearance下的GroupPanelText为" "

二、Devexpress GridControl切换数据源

gridControl1.DataSource = dt1;

(gridControl1.DefaultView as GridView).Columns.Clear();//切换前需要先把列清空了。

gridControl1.DataSource = dt2;

(gridControl1.DefaultView as GridView).PopulateColumns();

红色部分取一种写法即可。

三、选中的行、值

int selectRow = gridView1.GetSelectedRows()[0];

//1 需要知道列名

string id = this.gridView1.GetRowCellValue(selectRow, "id").ToString();

//2 获取焦点值

object selectValue = gridView1.GetFocusedValue();

四、显示搜索框

gridView1.OptionsFind.AlwaysVisible = true;

五、选中某一行

GridView.FocusedRowHandle =i;
GridView.SelectRow(i);

六：遍历GridView

for (int i = 0; i < gridView1.RowCount; i++)
{
       for (int j = 0; j < gridView1.Columns.Count; j++)
       {
             object val = gridView1.GetRowCellValue(i, gridView1.Columns[j]);
       }
}

七：单元格双击响应

需要先将gridview1.OptionsBehavior.Editable设为false,然后响应gridControl1_DoubleClick事件。

private void gridControl1_DoubleClick(object sender, EventArgs e)
        {
            MouseEventArgs arg = e as MouseEventArgs;
            if (arg == null)
                return;

GridHitInfo hitInfo = gridView1.CalcHitInfo(new Point(arg.X, arg.Y));//获取坐标点
            if (hitInfo.RowHandle >= 0)
            {
                DataRow row = gridView1.GetDataRow(hitInfo.RowHandle);
                _list.Clear();
                _list.Add(row[0].ToString());
                gisResoureMonControl1.SetSelectResource(_list);
            }           
        }

八、DevExpress gridcontrol如何分组显示

（1）、手动方式

1、添加分组项，Run Designer--Group Summary Items--Add，设置计算添加SummaryType：Count总计

2、设置显示格式

2.1 格式：{0}，效果：显示分组的列标题，如：Order ID

2.2 格式：{1}，效果：显示分组后的项，如：10248

3、效果如下：

（2）、代码

gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, "分组1");  //添加分组1，如果不是count，则名称必须与字段名对应
            gridView1.GroupFormat = "{1} {2}";  //默认"{0}: [#image]{1} {2}"; 字段名称：数据 计数=？

gridView1.Columns["部门名称"].GroupIndex = 0;  //设置默认分组列

//分组列格式
            gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Average, "id", gridView1.Columns["id"]);
            gridView1.GroupSummary[1].DisplayFormat = "AVG={0:c}";

gridView1.GroupSummary.Add(DevExpress.Data.SummaryItemType.Count, "姓名", gridView1.Columns["姓名"]);
           
((DevExpress.XtraGrid.GridSummaryItem)gridView1.GroupSummary[gridView1.GroupSummary.Count
- 1]).DisplayFormat = "小计：{0:N0}";

gridView1.ExpandAllGroups();

效果如下：

九 、C# devExpress GridControl 行中行 子行 多级行

 　　　　　　 DB db = new DB();
            DataSet ds = new System.Data.DataSet();
            SqlCommand comm2 = new SqlCommand(sql, db.getSqlConnection());  //db.getSqlConnection() 返回一个sqlConnection 对象
            SqlCommand comm3 = new SqlCommand(sql1, db.getSqlConnection());
            SqlCommand comm4 = new SqlCommand(sql2, db.getSqlConnection());
            SqlDataAdapter da2 = new SqlDataAdapter(comm2);
            SqlDataAdapter da3 = new SqlDataAdapter(comm3);
            SqlDataAdapter da4 = new SqlDataAdapter(comm3);
 
            da2.Fill(ds,"emp");
            da3.Fill(ds,"job");
            da4.Fill(ds,"re");
 
            this.treeListLookUpEdit1TreeList.DataSource = ds;
 
            DataColumn parentColumn = ds.Tables["emp"].Columns["empNum"];
            DataColumn childColumn = ds.Tables["job"].Columns["empNum"];
            DataColumn secondChild = ds.Tables["re"].Columns["empNum"];
 
            DataRelation relCustOrder;
            relCustOrder = new DataRelation("对应工作", parentColumn, childColumn);
            DataRelation job;
            job = new DataRelation("部门调整", childColumn, secondChild);
            ds.Relations.Add(relCustOrder);
            ds.Relations.Add(job);
            this.gridControl1.DataSource = ds.Tables["emp"];

十、隐藏从表列 （只能隐藏一级子表）

//隐藏子表（即从表）的列，获取主表的行展开事件

private void gridView3_MasterRowExpanded(object sender, DevExpress.XtraGrid.Views.Grid.CustomMasterRowEventArgs e)
{
 
    //获取所点击行的从表对象　　　　
    DevExpress.XtraGrid.Views.Grid.GridView childView= gridView3.GetDetailView(e.RowHandle, e.RelationIndex) as DevExpress.XtraGrid.Views.Grid.GridView;
    if (childView != null)
    {
        childView.Columns["MainId"].Visible = false;　　//隐藏子表列
 
    }
}

十一、展开第一级子表

 for (int i = ; i < gridView1.RowCount - ; i++)
 {
       gridView1.SetMasterRowExpandedEx(i, -, true);
 }

十二、展开所有子表 及隐藏子表的列

 int m_RelationIndex = ;
 private void ExpandAllRows()
        {
            for (int masteViewRowIndex = ; masteViewRowIndex < ds.Tables["Table1"].Rows.Count; masteViewRowIndex++)
            {
                MainGridView.ExpandMasterRow(masteViewRowIndex, );
                ExpandChildRows(MainGridView, masteViewRowIndex);
            }
        }
 
        private void ExpandChildRows(GridView gv, int rowIndex)
        {
            GridView currentChildGV = gv.GetDetailView(rowIndex, m_RelationIndex) as GridView;
            if (currentChildGV != null)
            {
                for (int childGVRowIndex = ; childGVRowIndex < currentChildGV.DataRowCount; childGVRowIndex++)
                {
                    ExpandChildRows(currentChildGV, childGVRowIndex);
　　　　　　　　　　　 //more 可以在此处隐藏子表的列
                }
            }
            else if (currentChildGV == null && gv.CanExpandMasterRowEx(rowIndex, m_RelationIndex))
            {
                gv.SetMasterRowExpandedEx(rowIndex, m_RelationIndex, true);
                ExpandChildRows(gv, rowIndex);
                //more 可以在此处隐藏子表的列
            }
            else if (currentChildGV == null && !gv.CanExpandMasterRowEx(rowIndex, m_RelationIndex))
            {
                return;
            }
        }

十三、GridControl切换数据源异常，提示 “无法将类型为“NameSpace.ClassName”的对象强制转换为类型“System.Data.DataRowView”。”

解决方法，在DataSource赋值前后加上BeginUpdate和EndUpdate

mainGridControl1.BeginUpdate();
mainGridControl1.DataSource = listProduct;
mainGridControl1.EndUpdate();

参考

1 DEV控件GridControl常用属性设置

2 DevExpress gridcontrol如何分组显示

3 DevExpress gridcontrol gridView主从表折叠/展开显示

4 DevExpressControl中的GridControl展现主从表数据结构