幫助轉換爲C＃

Question

有人可以幫我轉換成C＃嗎？

//' Import the ODBC namespace for MySQL Connection 
    Imports System.Data.Odbc 
    Partial Class login 
     Inherits System.Web.UI.Page 

     Protected Sub Login1_Authenticate(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.AuthenticateEventArgs) Handles Login1.Authenticate 
      Dim cn As New OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=mydb; User=root;Password=;") 
      cn.Open() 
      Dim cmd As New OdbcCommand("Select * from login where username=? and password=?", cn) 

      //'Add parameters to get the username and password 

      cmd.Parameters.Add("@username", OdbcType.VarChar) 
      cmd.Parameters("@username").Value = Me.Login1.UserName 

      cmd.Parameters.Add("@password", OdbcType.VarChar) 
      cmd.Parameters("@password").Value = Me.Login1.Password 

      Dim dr As OdbcDataReader 
      //' Initialise a reader to read the rows from the login table. 
      //' If row exists, the login is successful 

      dr = cmd.ExecuteReader 

      If dr.HasRows Then 
       e.Authenticated = True 
       //' Event Authenticate is true 
      End If 

     End Sub 
    End Class 
    } 
} 

Answer 1

// Import the ODBC namespace for MySQL Connection 
using System.Data.Odbc; 
partial class login : System.Web.UI.Page 
{ 



    protected void 
Login1_Authenticate(object sender, System.Web.UI.WebControls.AuthenticateEventArgs e) 
    { 
     OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=mydb; User=root;Password=;"); 
     cn.Open(); 
     OdbcCommand cmd = new OdbcCommand("Select * from login where username=? and password=?", cn); 

     //Add parameters to get the username and password 

     cmd.Parameters.Add("@username", OdbcType.VarChar); 
     cmd.Parameters["@username"].Value = this.Login1.UserName; 

     cmd.Parameters.Add("@password", OdbcType.VarChar); 
     cmd.Parameters["@password"].Value = this.Login1.Password; 

     OdbcDataReader dr = default(OdbcDataReader); 
     // Initialise a reader to read the rows from the login table. 
     // If row exists, the login is successful 

     dr = cmd.ExecuteReader(); 

     if (dr.HasRows) { 
      e.Authenticated = true; 
      // Event Authenticate is true 
     } 

    } 
} 

您可以使用this converter爲未來的轉換。

編輯：

你就必須使用本網站要連接在C＃中的事件這樣

protected void Page_Load(object sender, EventArgs e) 
{ 
     Login1.Authenticate += Login1_Authenticate; 
} 

Answer 2

快速轉換：http://converter.telerik.com

它看起來像一個事件處理程序，所以你必須在代碼中連接它。

using System.Data.Odbc; 
partial class login : System.Web.UI.Page 
{ 

    protected void // ERROR: Handles clauses are not supported in C# 
Login1_Authenticate(object sender, System.Web.UI.WebControls.AuthenticateEventArgs e) 
    { 
     OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=mydb; User=root;Password=;"); 
     cn.Open(); 
     OdbcCommand cmd = new OdbcCommand("Select * from login where username=? and password=?", cn); 

     //Add parameters to get the username and password 

     cmd.Parameters.Add("@username", OdbcType.VarChar); 
     cmd.Parameters("@username").Value = this.Login1.UserName; 

     cmd.Parameters.Add("@password", OdbcType.VarChar); 
     cmd.Parameters("@password").Value = this.Login1.Password; 

     OdbcDataReader dr = default(OdbcDataReader); 
     // Initialise a reader to read the rows from the login table. 
     // If row exists, the login is successful 

     dr = cmd.ExecuteReader; 

     if (dr.HasRows) { 
      e.Authenticated = true; 
      // Event Authenticate is true 
     } 

    } 
} 

Answer 3

使用這個在線工具， http://www.developerfusion.com/tools/convert/vb-to-csharp/

Answer 4

其它轉換看起來不錯，但原代碼是有點弱收盤方面/配置數據庫對象。這是一個輕微重構的版本，可以解決這些缺陷：

using System.Data.Odbc; 
partial class login : System.Web.UI.Page 


{ 

    protected void // ERROR: Handles clauses are not supported in C# 
    Login1_Authenticate(object sender, System.Web.UI.WebControls.AuthenticateEventArgs e) 
    { 
     using(OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=mydb; User=root;Password=;")); 
     using(OdbcCommand cmd = new OdbcCommand("Select * from login where username=? and password=?", cn)) 
     { 
      cn.Open(); 

      //Add parameters to get the username and password 

      cmd.Parameters.Add("@username", OdbcType.VarChar); 
      cmd.Parameters("@username").Value = this.Login1.UserName; 

      cmd.Parameters.Add("@password", OdbcType.VarChar); 
      cmd.Parameters("@password").Value = this.Login1.Password; 

      // Initialise a reader to read the rows from the login table. 
      // If row exists, the login is successful 

      using(OdbcDataReader dr = cmd.ExecuteReader) 
      { 
      if (dr.HasRows) { 
       e.Authenticated = true; 
       // Event Authenticate is true 
      } 
      } 

    } 
}