devExpress GridView删除行的几种方式

﹏ヽ暗。殇╰゛Y 2022-08-06 01:30 350阅读 0赞

一直以来，GridView的行删除，没的搞清楚。

以前是这样实现的，当然也可行，方法是第一步在Dataset中，加一个删除用的函数，然后删除之。

private void gridControlChaoSongRen\_EmbeddedNavigator\_ButtonClick(object sender, DevExpress.XtraEditors.NavigatorButtonClickEventArgs e)  
\{  
int hRowHandle = this.gridViewCSR.FocusedRowHandle;  
if (hRowHandle < 0)  
return;

object objRowId = gridViewCSR.GetRowCellValue(hRowHandle, "id");  
if (null == objRowId)  
\{  
return;  
\}  
int nId = Convert.ToInt32(objRowId);

if (e.Button.ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Remove)  
\{  
  
 **this.relChaosongrenProjectTableAdapter.DeleteByID(nId);**  
  
\}

curcsr = null;  
\}

但总觉得不是很理想。

看这个示例：

[https://documentation.devexpress.com/\#WindowsForms/DevExpressXtraGridViewsBaseColumnView\_DeleteRowtopic][https_documentation.devexpress.com_WindowsForms_DevExpressXtraGridViewsBaseColumnView_DeleteRowtopic]

private void gridView1\_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) \{  
if (e.KeyCode == Keys.Delete && e.Modifiers == Keys.Control) \{  
if (MessageBox.Show("Delete row?", "Confirmation", MessageBoxButtons.YesNo) !=  
DialogResult.Yes)  
return;  
GridView view = sender as GridView;  
 view.DeleteRow(view.FocusedRowHandle);  
 \}  
\}

这样看起来好一些。

但这里有个问题，KeyDown是GridView的事件，

而NavBar从属于gridCtrl.

当然，这不是大问题，问题是，

这样调用，

gridViewRG.DeleteRow(hRowHandle);

或者这样，

private void DeleteSelectedRowsResourceGroup(DevExpress.XtraGrid.Views.Grid.GridView view)  
\{

if (view == null || view.SelectedRowsCount == 0) return;

DataRow\[\] rows = new DataRow\[view.SelectedRowsCount\];  
for (int i = 0; i < view.SelectedRowsCount; i++)  
rows\[i\] = view.GetDataRow(view.GetSelectedRows()\[i\]);

view.BeginSort();  
try  
\{

foreach (DataRow row in rows)  
row.Delete();

this.resourceGroupTableAdapter.Update(this.schedulerDBDataSet);  
schedulerDBDataSet.AcceptChanges();

finally  
\{  
view.EndSort();  
\}

都出现的情况是，界面上少了两行。

经过思考，发现，少了一句话：

e.Handled = true;

比如，正确可以这样：

if (e.Button.ButtonType == DevExpress.XtraEditors.NavigatorButtonType.Remove)  
\{  
  
int hRowHandle = this.gridViewRG.FocusedRowHandle;  
if (hRowHandle < 0)  
return;

gridViewRG.DeleteRow(hRowHandle);

this.resourceGroupTableAdapter.Update(this.schedulerDBDataSet);  
schedulerDBDataSet.AcceptChanges();  
e.Handled = true;  
  
\}

或者

DevExpress.XtraGrid.GridControl ctrl = sender as DevExpress.XtraGrid.GridControl;

object objRowId = gridViewRG.GetRowCellValue(hRowHandle, "ResourceGroupID");  
DataRowView drv = (DataRowView)gridViewRG.GetRow(hRowHandle);  
DataRow row = drv.Row;  
row.Delete();

this.resourceGroupTableAdapter.Update(this.schedulerDBDataSet);  
schedulerDBDataSet.AcceptChanges();  
e.Handled = true;

[https_documentation.devexpress.com_WindowsForms_DevExpressXtraGridViewsBaseColumnView_DeleteRowtopic]: https://documentation.devexpress.com/#WindowsForms/DevExpressXtraGridViewsBaseColumnView_DeleteRowtopic