验证 WPF 组合框中的选定值
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原文地址: http://stackoverflow.com/questions/16923922/
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Validate the selected value in a WPF combobox
提问by Jesus Zamora
Like the title says, I am trying to validate my form, but I have an issue getting the combobox value:
正如标题所说，我正在尝试验证我的表单，但在获取组合框值时遇到了问题：
<ComboBox Name="ComboBox_Country"
Validation.Error="Validation_Error"
Text="{Binding UpdateSourceTrigger=PropertyChanged,
Path=Form_Country,
ValidatesOnDataErrors=true,
NotifyOnValidationError=true}"/>
Which is then validated with my class FormValidation like so:
然后使用我的类 FormValidation 进行验证，如下所示：
public string this[string columnName]
{
get
{
string result = null;
if (columnName == "Form_Country")
{
if (string.IsNullOrEmpty(Form_Country) || !verifyNumericValue(Form_Country))
result = "Please choose a correct option.";
}
}
I use these functions to call the validation in my form.
我使用这些函数在我的表单中调用验证。
private void Confirm_CanExecute(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = _errors == 0;
e.Handled = true;
}
private void Confirm_Executed(object sender, ExecutedRoutedEventArgs e)
{
_generic = new UnidadValidation();
grid_UnidadData.DataContext = _generic;
e.Handled = true;
}
private void Validation_Error(object sender, ValidationErrorEventArgs e)
{
if (e.Action == ValidationErrorEventAction.Added)
_errors++;
else
_errors--;
}
I wish to get the selected value, not the selected text. What is my best option?
我希望获得选定的值，而不是选定的文本。我最好的选择是什么？
回答by Jesus Zamora
Stupid, stupid stupid lack of observation on my part. If you were to change the ComboBox's Textto SelectedValueinstead like so:
愚蠢，愚蠢的愚蠢缺乏对我的观察。如果你要改变组合框的Text来SelectedValue，而不是像这样：
<ComboBox Name="ComboBox_Pais"
Validation.Error="Validation_Error"
SelectedValue="{Binding UpdateSourceTrigger=PropertyChanged,
Path=Escuela_Pais,
ValidatesOnDataErrors=true,
NotifyOnValidationError=true}"/>
One will get the selected value and NOT the text.
一个将获得选定的值而不是文本。
For those of you who might want to read on it, I found the original tutorial here.
对于那些可能想阅读它的人，我在这里找到了原始教程。
