文本框中的绑定验证规则类错误

问题描述

我正在尝试在文本框中绑定验证规则类，但是会引发此错误.

{不能在类型为"Binding"的"Path"属性上设置"Binding".只能在DependencyObject的DependencyProperty上设置"Binding"."}

我的代码是

i am trying to bind a validation rule class in textbox , but it throw this error.

{"A ''Binding'' cannot be set on the ''Path'' property of type ''Binding''. A ''Binding'' can only be set on a DependencyProperty of a DependencyObject."}

my code is

<TextBox x:Name="txtGTIN" Grid.Column="4" Grid.Row="1" Validation.ErrorTemplate="{StaticResource validationErrorTemplate}">
                  <TextBox.Text>
                  <Binding  Path="{Binding MetaData.GTIN}" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged">
                          <Binding.ValidationRules>
                              <ExceptionValidationRule/>
                          <viewModel:NewECGConfigurationViewModel/>

                          </Binding.ValidationRules>
                      </Binding>
                  </TextBox.Text>
              </TextBox>

它在Path

it throw error in Path

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