WPF ComboBox，强制输入到UpperCase [英] WPF ComboBox, force input to UpperCase

问题描述

我有一个可编辑的WPF ComboBox与TextSearchEnabled。

I have an editable WPF ComboBox with TextSearchEnabled. I need to force the user's text input to uppercase when they type to filter the ComboBox.

我想要修改作为控件一部分的文本框（名为PART_EditableTextBox '）设置 CharacterCasing =Upper，但我不知道该怎么做。

I was thinking of modifying the textbox that is part of the control (named 'PART_EditableTextBox') to set CharacterCasing="Upper", however I can't quite figure out how to do this.

我需要使用

推荐答案

这是一个合理的解决方案：

This works and seems like a reasonable solution:

protected void winSurveyScreen_Loaded(object sender, RoutedEventArgs e)
{
    (comboBox.Template.FindName("PART_EditableTextBox", cbObservation) as TextBox).CharacterCasing = CharacterCasing.Upper;
}

确保在加载时组合框未折叠，否则将找不到模板。

Ensure that the combobox is not collapsed on loaded otherwise the template will not be found.

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