“选择所有项目"默认为数据绑定下拉列表 [英] "Select All Items" as default for databound dropdown list

问题描述

我有一个绑定到gridview的下拉列表.我想添加一个下拉列表项，选中该选项后将默认显示所有gridview行.因此，我想作为第一个下拉列表项选择所有项"，将其作为默认项，并让gridview显示所有项.

谢谢.

I have a dropdown list which is bound to a gridview. I would like to add a dropdownlist item which, when selected, will default to displaying ALL gridview rows. So I would like as the first dropdown list item "Select ALL Items," have this as the default, and have the gridview display ALL items.

Thank you.

推荐答案

尝试一下

在下拉列表中添加全选"选项 [

Try this

Adding a "Select all" option to a drop down list[^]

ddl.DataSource = dt.Tables(0)
ddl.DataTextField = "NAME"
ddl.DataValueField = "SNO"
ddl.DataBind()
ddl.Items.Insert(0, "Select All")
ddl.SelectedIndex = 0

然后在下拉列表的选定索引上已更改

Then on selected index changed of dropdownlist

If ddl.SelectedIndex = 0 Then
  '''your logic
<br />End If

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