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DevExpress XtraGrid網(wǎng)格控件示例五：驗證終端用戶輸入的數(shù)據(jù)

原創(chuàng)|其它|編輯：郝浩|2012-10-19 17:39:19.000|閱讀 1445 次

概述：本示例中禁用了無效的“colBudget”列單元格賦值。單元格值應(yīng)該大于零且小于1,000,000。BaseView.ValidatingEditor事件處理檢查輸入值的有效性。如果出現(xiàn)無效的單元格賦值，BaseView.InvalidValueException事件會顯示異常消息框。在這樣情況下，調(diào)用GridView.HideEditor方法以便放棄所做的更改。

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本示例中禁用了無效的“colBudget”列單元格賦值。單元格值應(yīng)該大于零且小于1,000,000。BaseView.ValidatingEditor事件處理檢查輸入值的有效性。如果出現(xiàn)無效的單元格賦值，BaseView.InvalidValueException事件會顯示異常消息框。在這樣情況下，調(diào)用GridView.HideEditor方法以便放棄所做的更改。

using DevExpress.XtraEditors.Controls;
// ...
private void gridView1_ValidatingEditor(object sender, BaseContainerValidateEditorEventArgs e) {
if (gridView1.FocusedColumn.Name != "colBudget") return;
if ((Convert.ToInt32(e.Value) < 0) || (Convert.ToInt32(e.Value) > 1000000))
e.Valid = false;
}
private void gridView1_InvalidValueException(object sender, InvalidValueExceptionEventArgs e) {
e.ExceptionMode = ExceptionMode.DisplayError;
e.WindowCaption = "Input Error";
e.ErrorText = "The value should be greater than 0 and less than 1,000,000";
// Destroying the editor and discarding the changes made within the edited cell
gridView1.HideEditor();
}

Imports DevExpress.XtraEditors.Controls
' ...
Private Sub GridView1_ValidatingEditor(ByVal sender As Object, _
ByVal e As BaseContainerValidateEditorEventArgs) Handles GridView1.ValidatingEditor
If GridView1.FocusedColumn.Name <> "colBudget" Then Exit Sub
If (Convert.ToInt32(e.Value) < 0) Or (Convert.ToInt32(e.Value) > 1000000) Then
e.Valid = False
End If
End Sub
Private Sub GridView1_InvalidValueException(ByVal sender As Object, _
ByVal e As ValidatingEditorEventArgs) Handles GridView1.InvalidValueException
e.ExceptionMode = ExceptionMode.DisplayError
e.WindowCaption = "Input Error"
e.WindowText = "The value should be greater than 0 and less than 1,000,000"
' Destroying the editor and discarding the changes made within the edited cell
GridView1.HideEditor()
End Sub

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