Windows.Form组合框无法设置未绑定控件的SelectedValue属性 [英] Windows.Form ComboBox Cannot set the SelectedValue Property of Unbound Control

问题描述

我无法为未绑定的组合框设置默认的组合框所选的值。这是我的代码：

I cannot set the default combobox selected value for an unbound combobox. Here is my code:

         System.Console.WriteLine("Current Tag Org Id = " + CurrentTag.Org.OrgId);
         ddlRUC.SelectedValue = CurrentTag.Org.OrgId;
         System.Console.WriteLine("ddlRUC selected value = " + ddlRUC.SelectedValue);

以下是输出结果：
当前标签组织Id = 285
ddlRUC选择值=

Here is the output: Current Tag Org Id = 285 ddlRUC selected value =

请注意，ddlRUC.SelectedValue尚未设置为285.为了使用SelectedValue属性，数据源是否需要绑定？

Note that ddlRUC.SelectedValue has not been set to 285. Does the datasource need to be bound in order to use the SelectedValue property? If so, how do I set the default item shown in a combobox that is not bound?

推荐答案

SelectedValue属性只能工作为数据列表框。如果您可以在列表<>中创建列表项，您可以将列表绑定到控件，并且SelectedValue将按您的需要工作。

The SelectedValue property will only work for a databound listbox. If you can create your list items in a List<>, you can then bind the list to the control and SelectedValue will work as you would like.

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