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问题描述

嗨!

我想从名为cdirlocal的表中读取数据()。

并将所有单词插入listbox1(en),listbox2(type)和listbox3(pl),但列表框中没有显示任何内容。我需要做些什么来使它工作?



我尝试过的事情:



我有这个代码:



 进口 System.Data 
Imports System.Data.SqlClient
Public Form1
Dim 作为 字符串()
Dim 命令 As SqlCommand
Dim Reader As SqlDataReader



私有 Sub Form1_Load(发件人 As 对象,e As EventArgs)句柄 MyBase .Load
Dim conn As SqlConnection = SqlConnection( 服务器SRV =;数据库=分贝;用户ID =用户名;密码=通过;
尝试
conn.Open()

Dim 查询作为 字符串
查询= SELECT * FROM`cdirlocal`

Command = SqlCommand(Query,conn)
Reader = Command.ExecuteReader
while Reader.Read
ListBox1.Items.Add(Reader.GetString( en))
ListBox2.Items .Add(Reader.GetString( pl))
ListBox3.Items.Add( Reader.GetString( type))
结束 while

conn.Close()
Catch ex As 异常
MsgBox( 发生错误:& ex.ToString)
结束 尝试



结束 Sub

私有 Sub Button3_Click(发件人作为 对象,e As EventArgs)句柄 Button3.Click
Application。退出()
结束 Sub
结束
解决方案


Hi!
I want to read data from table named cdirlocal (Screenshot).
and insert all words to listbox1 (en), listbox2 (type) and listbox3 (pl), but there is nothing showing in listboxes. What do I need to do to make it working???

What I have tried:

I have this code:

Imports System.Data
Imports System.Data.SqlClient
Public Class Form1
    Dim table As String()
    Dim Command As SqlCommand
    Dim Reader As SqlDataReader



    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim conn As SqlConnection = New SqlConnection("Server=srv; Database=db; UserId=username; Password=pass;")
        Try
            conn.Open()

            Dim Query As String
            Query = "SELECT * FROM `cdirlocal`"

            Command = New SqlCommand(Query, conn)
            Reader = Command.ExecuteReader
            While Reader.Read
                ListBox1.Items.Add(Reader.GetString("en"))
                ListBox2.Items.Add(Reader.GetString("pl"))
                ListBox3.Items.Add(Reader.GetString("type"))
            End While

            conn.Close()
        Catch ex As Exception
            MsgBox("An error has occured: " & ex.ToString)
        End Try



    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Application.Exit()
    End Sub
End Class
解决方案


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08-13 00:41