主题：Datalist动态调用SQL外部数据

1.窗口的Afterload事件:
Dim dst As WinForm.DataList = e.Form.Controls("DataList1")
dst.DataTable = DataTables("客户")
dst.Build()

显示窗口如下:

此主题相关图片如下：1111.jpg


2.左边目录树的NodeMouseDoubleClick事件:

Dim 省市 As String = e.Form.Controls("TreeView1").SelectedNode.Text
Dim cmd As New SQLCommand
Dim dt As DataTable
Cmd.ConnectionName  = "systemdata" '外部数据源
cmd.CommandText = "Select * From {客户} Where [省市] = '" & 省市 & "'"
dt = cmd.ExecuteReader()  '生成统计表
Dim dst As WinForm.DataList = e.Form.Controls("DataList1")
dst.DataTable = dt
dst.Build()

其中"systemdata"为外部SQL数据源

点击左边的目录树,就出现如下错误, 右边Datalist中没有动戊显示:


此主题相关图片如下：22222.jpg


请各位帮忙指点一下,谢谢!

谢谢大家的帮助,现在成功了,准确的代码如下:

Dim 省市 As String = e.Form.Controls("TreeView1").SelectedNode.Text
Dim cmd As New SQLCommand
Dim dt As DataTable
Cmd.ConnectionName  = "systemdata" '外部数据源,注意大小写,
cmd.CommandText = "Select * From [客户] Where [省市] = '" & 省市 & "'"     '注意要用"[]"符号
dt = cmd.ExecuteReader()  '生成统计表
Dim dst As WinForm.DataList = e.Form.Controls("DataList1")
dst.DataTable = dt
dst.Build()