如何添加“选择"下拉选项 [英] How to add "Select" option to dropdown

问题描述

大家好，
我有一个绑定到对象数据源的下拉列表.现在，我希望在应用程序运行时，首先在其中显示选择".


谢谢您，
Amit

Hello All,
I have a Dropdown which is binded to object data source .Now I want that when application run the Dropdown firstly show "select" in it.


Thanks With Regards,
Amit

推荐答案

在简单的数据绑定之后添加此行

After databinding simple add this line

DropDown1.Items.Insert(0, "Select");
DropDown1.SelectedIndex = 0;

更改数据源查询以在其中包含选择"选项. br/>
例如

Change your datasource query to include a "select" option in it.

for e.g.

select "select", null<br />
UNION<br />
select [col1], [col2]

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