如何将插入符号位置设置为 WPF 密码框中的特定索引

How can i set the caret position to a specific index in passwordbox in WPF(如何将插入符号位置设置为 WPF 密码框中的特定索引)

问题描述

我需要在 WPF 中明确设置密码框内的光标位置.我在密码框中看不到 selectionstart 属性.

I need to set the cursorposition inside the passwordbox explicitly in WPF. I couldn't see the selectionstart property in passwordbox.

有什么帮助吗?

推荐答案

您可以尝试这样的方法来设置 PasswordBox 中的选择:

You can try something like this to set the selection in the PasswordBox:

private void SetSelection(PasswordBox passwordBox, int start, int length) {
    passwordBox.GetType().GetMethod("Select", BindingFlags.Instance | BindingFlags.NonPublic).Invoke(passwordBox, new object[] { start, length });
}

之后，这样调用它来设置光标位置:

After that, call it like this to set the cursor position:

// set the cursor position to 2...
SetSelection( passwordBox1, 2, 0);

// focus the control to update the selection
passwordBox1.Focus();

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