C# 如何动态访问 XAML 中的元素名称？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/685077/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to dynamically access element names in XAML?
提问by Edward Tanguay
I have a XAML input form which the user fills out.
我有一个用户填写的 XAML 输入表单。
I want to validate this form.
我想验证这个表格。
I have the field information in a collection which I want to loop through and check each field.
我有一个集合中的字段信息，我想循环并检查每个字段。
But how do I access the name of the field when it is in a string, e.g. when fieldInformation.FieldName = "CompanyName" I want to check "Field_CompanyName.Text".
但是当它在一个字符串中时我如何访问字段的名称，例如当 fieldInformation.FieldName = "CompanyName" 我想检查 "Field_CompanyName.Text" 时。
Pseudocode:
伪代码：
foreach (var fieldInformation in _fieldInformations)
{
if (Field_{&fieldInformation.FieldName}.Text.Length > 2)
{
ErrorMessage.Text = String.Format("The length of {0} is too long, please correct.", fieldInformation.FieldName);
entryIsValid = false;
}
}
XAML:
XAML：
<StackPanel Orientation="Horizontal" Margin="10 10 10 0">
<TextBlock Width="150" Text="Customer ID:"/>
<TextBox x:Name="Field_CustomerID" Width="150" MaxLength="5" Text=""/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="10 10 10 0">
<TextBlock Width="150" Text="Company Name:"/>
<TextBox x:Name="Field_CompanyName" Width="150" MaxLength="40" Text=""/>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="10 10 10 0">
<TextBlock Width="150" Text="Contact Name:"/>
<TextBox x:Name="Field_ContactName" Width="150" MaxLength="30" Text=""/>
</StackPanel>
Code-Behind:
代码隐藏：
_fieldInformations.Add(new FieldInformation { FieldName = "CustomerID", FieldSize = 5 });
_fieldInformations.Add(new FieldInformation { FieldName = "CompanyName", FieldSize = 40 });
_fieldInformations.Add(new FieldInformation { FieldName = "ContactName", FieldSize = 30 });
采纳答案by sipwiz
Isn't that just a FindName call in you code behind file or am I missing something?
这不只是在您的代码隐藏文件中调用 FindName 还是我遗漏了什么？
TextBox fieldTB = (TextBox)this.FindName("Field_CompanyName");
回答by Denis Vuyka
Also if you are willing to add UI elements from code behind you will have to use the RegisterName("Field_CompanyName", some_instance)method call as FindNameworks by default only for elements declared within XAML.
此外，如果您愿意从后面的代码中添加 UI 元素，您将不得不使用RegisterName("Field_CompanyName", some_instance)方法调用作为FindName默认情况下仅适用于在 XAML 中声明的元素。
