IDataErrorInfo を使用して検証するデータグリッドがあります。保存ボタンをクリックしたときに検証が失敗した場合にエラーメッセージを表示したいと思います。私の問題は、検証エラーを取得する方法です。これらにうんざりしている人は解決策を知っていますか?私のデータグリッドは次のとおりです。
<my:DataGrid Name="dgDamagedProducts" ItemsSource="{Binding}" SelectionUnit="Cell" BeginningEdit="dgDamagedProducts_BeginningEdit" AutoGenerateColumns="False" Margin="13,75,9,117" RowEditEnding="dgDamagedProducts_RowEditEnding" GotFocus="dgDamagedProducts_GotFocus">
<my:DataGrid.Columns>
<!--0-ProductTransaction ID Column-->
<my:DataGridTextColumn Header="ProductTransaction ID" Visibility="Hidden" Width="0" Binding="{Binding ProductTransactionID}"></my:DataGridTextColumn>
<!--1-Item incID Column-->
<my:DataGridTextColumn Header="ItemID" Visibility="Hidden" Width="0" Binding="{Binding ItemID}"></my:DataGridTextColumn>
<!--2-Product Code Column-->
<my:DataGridTextColumn Header="Code" Width="100" Binding="{Binding ProductCode}"></my:DataGridTextColumn>
<!--3-Product Column-->
<my:DataGridTemplateColumn Header="Product Name" Width="200">
<my:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Padding="3" Text="{Binding ProductName,NotifyOnValidationError=True,ValidatesOnDataErrors=True}" Style="{StaticResource TextBlockInError}"></TextBlock>
</DataTemplate>
</my:DataGridTemplateColumn.CellTemplate>
<my:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox x:Name="txtbxProduct" Style="{StaticResource TextBoxInError}" Text="{Binding Path=ProductName,Mode=TwoWay,NotifyOnValidationError=True,ValidatesOnDataErrors=True}" lc:FocusAttacher.Focus="True" TextChanged="txtbxProduct_TextChanged" PreviewKeyDown="txtbxProduct_PreviewKeyDown" ></TextBox>
</DataTemplate>
</my:DataGridTemplateColumn.CellEditingTemplate>
</my:DataGridTemplateColumn>
<!--7-Purchase Rate Column-->
<my:DataGridTextColumn Header="Purchase Rate" Width="100" Binding="{Binding PurchaseRate}" IsReadOnly="True"></my:DataGridTextColumn>
<!--8-Stock Column-->
<my:DataGridTextColumn Header="Stock" Binding="{Binding AvailableQty}" IsReadOnly="True" Visibility="Hidden"></my:DataGridTextColumn>
<!--9-Qty Column-->
<my:DataGridTemplateColumn Header="Qty" Width="100">
<my:DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Qty,ValidatesOnDataErrors=True}" Style="{StaticResource TextBlockInError}"></TextBlock>
</DataTemplate>
</my:DataGridTemplateColumn.CellTemplate>
<my:DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<RH:IntTextBox x:Name="txtbxQty" Style="{StaticResource TextBoxInError}" Text="{Binding Qty,Mode=TwoWay,UpdateSourceTrigger=LostFocus,ValidatesOnDataErrors=True}" lc:FocusAttacher.Focus="True" LostFocus="txtbxQty_LostFocus" PreviewKeyDown="txtbxQty_PreviewKeyDown"></RH:IntTextBox>
</DataTemplate>
</my:DataGridTemplateColumn.CellEditingTemplate>
</my:DataGridTemplateColumn>
<!--10-Amount Column-->
<my:DataGridTextColumn Header="Amount" Width="100" Binding="{Binding Amount}" IsReadOnly="True" ></my:DataGridTextColumn>
</my:DataGrid.Columns>
</my:DataGrid>
編集
私のクラスは次のとおりです。
class clsDamagedProducts : INotifyPropertyChanged,IDataErrorInfo
{
private int _ProductTransactionID;
private int _ItemID;
private string _ProductCode;
private string _ProductName;
private string _Batch;
private int _UnitID;
private string _UnitName;
private decimal _PurchaseRate;
private int _AvailableQty;
private int _Qty;
private decimal _Amount;
private string _Remark;
#region Property Getters and Setters
public int ProductTransactionID
{
get { return _ProductTransactionID; }
set
{
_ProductTransactionID = value;
OnPropertyChanged("ProductTransactionID");
}
}
public int ItemID
{
get { return _ItemID; }
set
{
_ItemID = value;
OnPropertyChanged("ItemID");
}
}
public string ProductCode
{
get { return _ProductCode; }
set
{
_ProductCode = value;
OnPropertyChanged("ProductCode");
}
}
public string ProductName
{
get { return _ProductName; }
set
{
_ProductName = value;
OnPropertyChanged("ProductName");
}
}
public string Batch
{
get { return _Batch; }
set
{
_Batch = value;
OnPropertyChanged("Batch");
}
}
public int UnitID
{
get { return _UnitID; }
set
{
_UnitID = value;
OnPropertyChanged("UnitID");
}
}
public string UnitName
{
get { return _UnitName; }
set
{
_UnitName = value;
OnPropertyChanged("UnitName");
}
}
public decimal PurchaseRate
{
get { return _PurchaseRate; }
set
{
_PurchaseRate = value;
OnPropertyChanged("PurchaseRate");
}
}
public int AvailableQty
{
get { return _AvailableQty; }
set
{
_AvailableQty = value;
OnPropertyChanged("AvailableQty");
}
}
public int Qty
{
get { return _Qty; }
set
{
_Qty = value;
this._Amount = this._Qty * this._PurchaseRate;
OnPropertyChanged("Qty");
OnPropertyChanged("Amount");
}
}
public decimal Amount
{
get { return _Amount; }
set
{
_Amount = value;
OnPropertyChanged("Amount");
}
}
public string Remark
{
get { return _Remark; }
set
{
_Remark = value;
OnPropertyChanged("Remark");
}
}
#endregion
#region IDataErrorInfo Members
public string Error
{
get
{
return "";
}
}
public string this[string name]
{
get
{
string result = null;
if (name == "ProductName")
{
int count = Global.ItemExist(this._ProductName);
if (count == 0)
{
result = "Invalid Product";
}
}
else if (name == "Qty")
{
if (this._Qty >this._AvailableQty)
{
result = "Qty must be less than Available Qty . Avaialble Qty : "+this._AvailableQty;
}
}
return result;
}
}
#endregion
#region INotifyPropertyChanged Members
// Declare the event
public event PropertyChangedEventHandler PropertyChanged;
//// Create the OnPropertyChanged method to raise the event
protected void OnPropertyChanged(string name)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(name));
}
}
#endregion
}