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过去一周我一直坚持这一点，如果你们能提供帮助，我会很高兴。

我正在使用 MS Visual Studio 2010 开发 vb。我目前在名为“app_data”的 asp.net 文件夹下有一个数据库。

我正在尝试通过 web.config 文件执行 connectionString 命令。

网络配置：

<connectionStrings>
    <add name="mysqlcon" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\public.mdf;Integrated Security=True;User Instance=True"
      providerName="System.Data.SqlClient" />
  </connectionStrings>

主要代码：

 Dim a As String = ConfigurationManager.ConnectionStrings("mysqlcon").ConnectionString
        Dim conn As New MySqlConnection(a)



        Try


            conn.Open()
            MsgBox("good")

            conn.Close()
        Catch ex As MySqlException
            MsgBox(ex.Message)
        Finally
            conn.Dispose()

        End Try

我收到以下错误（第 10 行突出显示）：

Server Error in '/MP' Application.

Keyword not supported.

Parameter name: attachdbfilename


Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Keyword not supported.
Parameter name: attachdbfilename

Source Error:


Line 8:      Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 9:          Dim a As String = ConfigurationManager.ConnectionStrings("mysqlcon").ConnectionString
Line 10:         Dim conn As New MySqlConnection(a)
Line 11: 
Line 12: 



Stack Trace:


[ArgumentException: Keyword not supported.
Parameter name: attachdbfilename]
   MySql.Data.MySqlClient.MySqlConnectionStringBuilder.ValidateKeyword(String keyword) +108
   MySql.Data.MySqlClient.MySqlConnectionStringBuilder.set_Item(String keyword, Object value) +18
   System.Data.Common.DbConnectionStringBuilder.set_ConnectionString(String value) +185
   MySql.Data.MySqlClient.MySqlConnection.set_ConnectionString(String value) +289
   MySql.Data.MySqlClient.MySqlConnection..ctor(String connectionString) +26
   test.Button1_Click(Object sender, EventArgs e) in C:\Users\God\Desktop\VB\MP\test.aspx.vb:10
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

如果你们能提供帮助会很高兴。

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2 回答 2

2

user2072778，试试这个，它可能会工作：

<add name="mysqlcon" connectionString="Data Source=|DataDirectory|public.mdf" providerName="System.Data.SqlClient" />

这是搜索此主题的好页面：http: //www.connectionstrings.com/sql-server-2008

于 2013-02-14T17:30:38.440 回答
1

您正在尝试使用MySQL连接对象进行连接：

Dim conn 作为新的 MySqlConnection(a)

使用Microsoft SQL Server连接字符串：

<add name="mysqlcon" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\public.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" />

他们只是不匹配。如果要连接到 MySQL 数据库，请相应地更改连接字符串。

于 2013-09-13T08:55:40.650 回答