禁用/启用DataGridTextColumn验证按钮

本文介绍了禁用/启用DataGridTextColumn验证按钮的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有这样的的DataGrid ：

<DataGrid ItemsSource="{Binding CustomerXml}" Name="customersDataGrid" AutoGenerateColumns="False" DataContext="{Binding}"> <DataGrid.Columns> <DataGridTextColumn Header="Name"> <DataGridTextColumn.Binding> <Binding Path="Name" ValidatesOnDataErrors="True" UpdateSourceTrigger="PropertyChanged" NotifyOnValidationError="True"> <Binding.ValidationRules> <local:NameValidationRule/> </Binding.ValidationRules> </Binding> </DataGridTextColumn.Binding> </DataGridTextColumn> ... </DataGrid.Columns> </DataGrid>

和我试图禁用和有效性规则结果使保存按钮。

and I'm trying disabling and enabling save button by ValidationRule result.

<Button Content="Save" Name="save" Click="save_Click"> <Button.Style> <Style TargetType="{x:Type Button}"> <Setter Property="IsEnabled" Value="false" /> <Style.Triggers> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding ElementName=customersDataGrid, Path=(Validation.HasError)}" Value="false" /> </MultiDataTrigger.Conditions> <Setter Property="IsEnabled" Value="true" /> </MultiDataTrigger> </Style.Triggers> </Style> </Button.Style> </Button>

但是，如果为ValidationResult 设置为true或false，按钮仍然被禁用。

But if the ValidationResult is set to true or false, button is still disabled.

推荐答案

于是我找到解决方法：

int count = 0; private void customersDataGrid_Error(object sender, ValidationErrorEventArgs e) { if (e.Action == ValidationErrorEventAction.Added) { save.IsEnabled = false; count++; } if (e.Action == ValidationErrorEventAction.Removed) { count--; if (count == 0) save.IsEnabled = true; } }