devexpress gridctrl 部分总结
1.如何新建记录更新记录
绑定导航控件
有两种方式，添加NavBar
一种是采用devexpress 的
this.gridControl.UseEmbeddedNavigator = true;
第二种是采用 System.Windows.Forms.BindingNavigator
然后，gridctrl和BindingNavigator指向同一个数据源。
this.keHuBindingNavigator.BindingSource = this.keHuBindingSource;
this.keHuGridControl.DataSource = this.keHuBindingSource;
保存数据
如采用System.Windows.Forms.BindingNavigator，则在其SaveItem事件中：
private void keHuBindingNavigatorSaveItem_Click(object sender, EventArgs e)
{
this.Validate();
this.keHuBindingSource.EndEdit();
this.tableAdapterManager.UpdateAll(this.lMISV1DataSet);
}
正常的：
private void gridViewProject_RowUpdated(object sender, DevExpress.XtraGrid.Views.Base.RowObjectEventArgs e)
{
try
{
DataRowView drv = (DataRowView)e.Row;
DataRow row = drv.Row;
UpdateProject(row);
}
catch (System.Exception ex)
{
MyErrExcu.E(ex);
}
}
void UpdateProject(DataRow row)
{
try
{
string strProjectName = "";
//Trace.Assert(row.RowState != DataRowState.Unchanged);
if (row.RowState == DataRowState.Unchanged)
{
return;
}
if (row.RowState == System.Data.DataRowState.Added)
{
//不允许添加重名项目
strProjectName = row["ProjectGroupName"].ToString();
if (this.projectTableTableAdapter.GetDataByProjectName(strProjectName).Count > 0)
{
MessageBox.Show("存在重复的项目");
return;
}
}
else if (row.RowState == System.Data.DataRowState.Modified)
{
//不允许改到一个重名的项目
//不允许添加重名项目
strProjectName = row["ProjectGroupName"].ToString();
MyDataSet.ProjectTableDataTable tmpTable = this.projectTableTableAdapter.GetDataByProjectName(strProjectName);
if (tmpTable.Count > 0)
{
//检查是不是自己所在的行，如果不是，则报错
int nCurProjectId = Convert.ToInt32(row["ProjectID"].ToString());
LMISV1DataSet.ProjectTableRow curRow = (LMISV1DataSet.ProjectTableRow)tmpTable.Rows[0];
if (nCurProjectId != curRow.ProjectID)
{
MessageBox.Show("存在重复的项目");
return;
}
}
}
else
{
}
this.projectTableTableAdapter.Update(row);
//UpdateRelCaption(strProjectName);
}
catch (System.Exception ex)
{
MyErrExcu.E(ex);
}
}
当然，多数情况下，下面几句就可以了：
private void gridViewXXX_RowUpdated(object sender, DevExpress.XtraGrid.Views.Base.RowObjectEventArgs e)
{
DataRowView drv = (DataRowView)e.Row;
DataRow row = drv.Row;
this.xxxTableAdapter.Update(row);
curcsr = null;
}
事前检查
private void gridViewProject_ValidateRow(object sender, DevExpress.XtraGrid.Views.Base.ValidateRowEventArgs e)
{
try
{
DataRowView drv = (DataRowView)e.Row;
DataRow row = drv.Row;
//不允许改到一个重名的项目
//不允许添加重名项目
string strProjectName = row["ProjectGroupName"].ToString();
if (System.String.IsNullOrEmpty(strProjectName))
{
e.ErrorText = "请指定项目名\r\n";
e.Valid = false;
}
MyDataSet.ProjectTableDataTable tmpTable = this.projectTableTableAdapter.GetDataByProjectName(strProjectName);
if (tmpTable.Count > 0)
{
//检查是不是自己所在的行，如果不是，则报错
int nCurProjectId = Convert.ToInt32(row["ProjectID"].ToString());
LMISV1DataSet.ProjectTableRow curRow = (LMISV1DataSet.ProjectTableRow)tmpTable.Rows[0];
if (nCurProjectId != curRow.ProjectID)
{
e.ErrorText = "存在重复的项目\r\n";
e.Valid = false;
return;
}
}
}
catch (System.Exception ex)
{
e.ErrorText = "有效性检查失败\r\n";
e.Valid = false;
MyErrExcu.E(ex);
}
}
通过EmbedNavBar删除
private void gridControlShr_EmbeddedNavigator_ButtonClick(object sender, DevExpress.XtraEditors.NavigatorButtonClickEventArgs e)
{
int hRowHandle = gridViewShr.FocusedRowHandle;
if (hRowHandle < 0)
return;
object objRowId = gridViewShr.GetRowCellValue(hRowHandle, "id");
if (null == objRowId)
{
return;
}
int nId = Convert.ToInt32(objRowId);
//删除当前项
if (e.Button.ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Remove)
{
this.relShrProjectTableAdapter.DeleteById(nId);
}
}
通过EmbedNavigator append
if (e.Button.ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Append)
{
labchon:
InputBoxResult test = InputBox.Show(this, "请输入项目组名称：", "项目组名称", "", 100, 0);
if (test.ReturnCode == DialogResult.OK)
{
//不允许添加重名项目
m_tmpstrProjectName = test.Text;
if (this.projectTableTableAdapter.GetDataByProjectName(m_tmpstrProjectName).Count > 0)
{
if (System.Windows.Forms.DialogResult.Yes == MessageBox.Show("存在重复的项目", "重新设定吗", MessageBoxButtons.YesNo))
{
goto labchon;
}
}
}
}
添加一个菜单项
private void gridViewProject_PopupMenuShowing(object sender, DevExpress.XtraGrid.Views.Grid.PopupMenuShowingEventArgs e)
{
DevExpress.Utils.Menu.DXMenuItem item = new DevExpress.Utils.Menu.DXMenuItem();
item.Caption = "克隆项目组";
item.Click += new EventHandler(this.createNewDocumentItemClick);
e.Menu.Items.Add(item);
}
private void createNewDocumentItemClick(object sender, EventArgs e)
{
int hRowHandle = this.gridViewProject.FocusedRowHandle;
if (hRowHandle < 0)
return;
object objRowId = gridViewProject.GetRowCellValue(hRowHandle, "ProjectID");
object objRowName = gridViewProject.GetRowCellValue(hRowHandle, "ProjectGroupName");
if (null == objRowId)
{
return;
}
int nId = Convert.ToInt32(objRowId);
InputBoxResult test = InputBox.Show(this, "请输入项目组名称：", "项目组名称", objRowName.ToString() + "克隆", 100, 0);
if (test.ReturnCode == DialogResult.OK)
{
//不允许添加重名项目
string strProjectName = test.Text;
if (this.projectTableTableAdapter.GetDataByProjectName(strProjectName).Count > 0)
{
MessageBox.Show("存在重复的项目");
return;
}
DT.LMISDAL.BLL.ProjectTable mProjectDalBLL = new DT.LMISDAL.BLL.ProjectTable();
if (mProjectDalBLL.CloneProject(nId, strProjectName))
{
LoadData();
syslog.Username = user.USERNAME;
syslog.Events = "克隆项目组";
syslog.Bz = "原项目ID为" + nId.ToString();
syslogdal.AddAInfo(syslog);
MessageBox.Show("克隆成功！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("添加失败！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
}
}
为新加的行赋初值：
private void gridViewShr_InitNewRow(object sender, DevExpress.XtraGrid.Views.Grid.InitNewRowEventArgs e)
{
int hRowHandle = this.gridViewProject.FocusedRowHandle;
if (hRowHandle < 0)
return;
object objRowId = this.gridViewProject.GetRowCellValue(hRowHandle, "ProjectID");
if (null == objRowId)
{
MessageBox.Show("请选择一个项目");
return;
}
int nCurProjId = Convert.ToInt32(objRowId);
DevExpress.XtraGrid.Views.Grid.GridView view = sender as DevExpress.XtraGrid.Views.Grid.GridView;
view.SetRowCellValue(e.RowHandle, view.Columns["ProjectId"], nCurProjId.ToString());
view.ShowEditor();
}
另一种存入数据库的方式
在devexpress的示例中，总是使用这种暴力的方式存入数据库
void SaveItems()
{
this.Validate();
this.resourcesBindingSource.EndEdit();
this.resourcesTableAdapter.Update(this.schedulerDBDataSet);
schedulerDBDataSet.AcceptChanges();
}
或是这样：
private void schedulerStorage_AppointmentsChanged(object sender, DevExpress.XtraScheduler.PersistentObjectsEventArgs e)
{
this.appointmentsTableAdapter.Update(schedulerDBDataSet);
schedulerDBDataSet.AcceptChanges();
}
理论上，与上面， this.xxxTableAdapter.Update(row);
应当无差别，性能差别应当不大，因为可以在 schedulerDBDataSet中记录下哪些行发生了改变
其它的：
CellValueChange
private void gridViewCSR_CellValueChanged(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)
{
if (gridViewCSR.FocusedRowHandle == DevExpress.XtraGrid.GridControl.NewItemRowHandle)
{
switch (gridViewCSR.FocusedColumn.FieldName)
{
case "ChaoSongRenId":
if (null != curcsr)
{
gridViewCSR.ActiveEditor.EditValue = curcsr.id.ToString();
}
break;
}
}
}
FocusedRowChanged
private void gridViewProject_FocusedRowChanged(object sender, DevExpress.XtraGrid.Views.Base.FocusedRowChangedEventArgs e)
{
//
//得到proect 名称，然后设置到下面的grid的标题上
int hRowHandle = e.FocusedRowHandle;
if (hRowHandle < 0)
return;
object objRowId = gridViewProject.GetRowCellValue(hRowHandle, "ProjectID");
object objRowName = gridViewProject.GetRowCellValue(hRowHandle, "ProjectGroupName");
if (null != objRowId)
{
int nCurProjectId = Convert.ToInt32(objRowId);
if (tabCtrlVgrid.SelectedIndex != 0)
{
tabCtrlVgrid.SelectedIndex = 0;
}
}
if (null != objRowName)
{
this.gridViewShr.ViewCaption = objRowName.ToString();
}
}
装载数据
this.projectTableTableAdapter.Fill(this.lMISV1DataSet.ProjectTable);
过滤
shouhuorenv2BindingSource.Filter = "id=" + nId.ToString();
窗体加载时，初始化一个过滤器
private void dlgSelectCsrSimple_Load(object sender, EventArgs e)
{
if (!System.String.IsNullOrEmpty(m_strProjectName))
{
string strFilter = "StartsWith([ProjectGroupName], '" + m_strProjectName + "')";
DevExpress.XtraGrid.Views.Base.ViewFilter curFilter = this.gridViewVCsrProject.ActiveFilter;
//
DevExpress.XtraGrid.Columns.ColumnFilterInfo filter = new DevExpress.XtraGrid.Columns.ColumnFilterInfo(strFilter);
curFilter.Add(colProjectGroupName, filter);
}
}