具有显示和隐藏值的C#中的compobox [英] compobox in c# with disply and hidden value

问题描述

嗨
我有一个项目，我有一个compobox，在compobox中，我的数据库中有数据表格.

我使用此compobox插入到另一个表中，但是我不希望选择的值是我想要的隐藏值(换句话说，在compobox中，显示的单词是"Name"，但我想插入"ID" ;)

谢谢

Hi
I have project I and I have compobox , in the compobox I have data form table in database.

I use this compobox to insert to another table but I don''t want the selected value I want the hidden value ( in other words in the compobox the shown word is " Name " but I want to insert the " ID " )

Thanks

推荐答案

我要做的方法是创建一个保存一行信息的类，并重写ToString实现以仅返回信息我想了.然后，当您使用ComboBox.SelectedItem属性时，只需将其转换为适当的类型即可:

The way I would do it is to create a class which held one row''s worth of information, and override the ToString implementation to return just the information I wanted. Then when you use the ComboBox.SelectedItem property, you just cast it to the appropriate type:

Video video = myComboBox.SelectedItem as Video;
if (video != null)
    {
    Console.WriteLine("{0}:{1}", video.Id, video.Title);
    }

compobox，显示的单词是名称"，但我想插入"ID"
使用SelectedValue属性.

参考: MSDN:ListControl.SelectedValue属性 [ ^ ]

示例示例:

compobox the shown word is " Name " but I want to insert the " ID "
Use the SelectedValue property for it.

Refer: MSDN: ListControl.SelectedValue Property [^]

Sample example:

// Set the name as the property to be displayed and the ID as the value to be returned when a row is selected.  
// Here these are properties; if we were binding to a database table or query these could be column names.
ComboBox1.DisplayMember = "Name";
ComboBox1.ValueMember = "ID";

// After selection
// this will give you the inner 'hidden' value
textBox1.Text = ComboBox1.SelectedValue.ToString();
// If you also wanted to get the displayed text
// the SelectedItem item property:
// string s = ((USState)ComboBox1.SelectedItem).Name;

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