控件...treeview在设计器中引发了一个未经处理的异常,错误为:创建窗口句柄时出错
昨天在dotnetbar里加了个树形结构,结果,form.show(),错误,错误信息为:创建窗体时出错,进行了循环控件引用,控件不能属于自身或为自身的父级。关了程序在次启动,结果就变成了标题中的样子,点设计器就变成了引发类型为“System.ComponentModel.Design.ExceptionCollection”的异常。,初次接触vb2010,好多东西不会,还望各位指点迷津啊!form1的代码如下:
Public Class Form1
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
End Sub
Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MM.TextChanged
MM.PasswordChar = "*"
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim User As String, PassWord As String
User = Trim(YH.Text)
PassWord = Trim(MM.Text)
Dim CNN = New SqlClient.SqlConnection()
CNN.ConnectionString = "Data Source=****;Initial Catalog=****;user id=****;pwd=****"
CNN.Open()
Dim DA As SqlClient.SqlDataAdapter
DA = New SqlClient.SqlDataAdapter("select * from AGZGXX where (姓名 like '" & User & "') and (密码 like '" & PassWord & "')", CNN)
Dim DT = New DataTable
DA.Fill(DT)
If User = "" Or PassWord = "" Then
MsgBox("对不起,用户名或密码不能为空")
End If
If DT.Rows.Count = 1 Then
MsgBox("登录成功")
物料管理系统.Show()
Me.Hide()
Else
MsgBox("用户名或密码错误")
End If
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
End
End Sub
End Class
--------------------编程问答-------------------- 求专业人士指点迷津啊!!有没有碰到跟我情况一样的呢!! --------------------编程问答-------------------- 没看到有树形控件,这个只有改布局代码了。...designer.cs
补充:.NET技术 , VB.NET