如何将组合的默认值设置为“ - 选择 - ” [英] How to set default value of combo as "--select--"

问题描述

如何在windowsform应用程序中将组合框的默认值设置为--select--

How to set default value of combobox as "--select--" in windowsform application

推荐答案

您有两种可能：

Combobox.SetCurrentValue [ ^ ]

SetCurrentValue 设置依赖项属性的值而不更改其值源。

或

Combobox.SetValue [ ^ ]

SetValue 设置依赖项属性的本地值。



查看其他 Combobox [ ^ ]属性（SelectedValue，SelectedIndex，SelectedItem）取决于您当前的.NET Framework版本。

You got 2 possibilities:
Combobox.SetCurrentValue[^]
SetCurrentValue sets the value of a dependency property without changing its value source.
or
Combobox.SetValue[^]
SetValue sets the local value of a dependency property.

Check other Combobox[^] properties (SelectedValue, SelectedIndex, SelectedItem) depending of your current .NET Framework version.

ComboBox myCombo;

private void SetAsDefault()
{
// this sets the combobox to the first item
// to change which item will be selected change the index;
// if you want to set the combobox to have nothing selected change index to -1 
int index = 0;
myCombo.SelectedIndex = index;
}

这篇关于如何将组合的默认值设置为“ - 选择 - ”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！