將Microsoft Access數據庫上載到Microsoft SQL Server Express數據庫中

Question

我正嘗試將Microsoft Access數據庫上載到Microsoft SQL Server Express數據庫中。

Access和SQL數據庫的結構除了主鍵的名稱是相同的。

錯誤代碼：

System.InvalidOperationException: No data exists for the row/column. at System.Data.OleDb.OleDbDataReader.DoValueCheck(Int32 ordinal) at System.Data.OleDb.OleDbDataReader.GetValue(Int32 ordinal) at System.Data.OleDb.OleDbDataReader.get_Item(Int32 index) at ACCESStoMDF._Default.Button1_Click(Object sender, EventArgs e) in C:\Users\path2ACCESStoMDF\ACCESStoMDF\Default.aspx.cs:line 44 

的web.config

<configuration> 
    <connectionStrings> 
    <add name="ACCESSdb" 
    connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\path1\DBaccess.accdb;Persist Security Info=False;" /> 
    <add name="MSSQLdb" 
    connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\MSSQLdb.mdf;User Instance=true;" 
    providerName="System.Data.SqlClient" /> 
    </connectionStrings> 

MSAccessTOMSSQL.aspx.cs

protected void Button1_Click(object sender, EventArgs e) 
    { 

     String connStr = ConfigurationManager.ConnectionStrings["ACCESSdb"].ConnectionString; 
     String cmdStr = "SELECT * FROM [TableACCESS];"; 
     try 
     { 
      using (OleDbConnection conn = new OleDbConnection(connStr)) 
      { 
       using (OleDbCommand cmd = new OleDbCommand(cmdStr, conn)) 
       { 
        conn.Open(); 
        using (OleDbDataReader dr = cmd.ExecuteReader()) 
        { 

         String connStr1 = ConfigurationManager.ConnectionStrings["MSSQLdb"].ConnectionString; 
         String cmdStr1 = "INSERT INTO [Table1] (col1,col2,col3) VALUES (@col1,@col2,@col3);"; 
         try 
         { 
          using (SqlConnection conn1 = new SqlConnection(connStr1)) 
          { 
           using (SqlCommand cmd1 = new SqlCommand(cmdStr1, conn1)) 
           { 
            conn1.Open(); 
            cmd1.Parameters.AddWithValue("@col1", dr[1]); 
            cmd1.Parameters.AddWithValue("@col2", dr[2]); 
            cmd1.Parameters.AddWithValue("@col3", dr[3]); 
            cmd1.ExecuteNonQuery(); 
            conn1.Close(); 
            cmd1.Dispose(); 
            conn1.Dispose(); 
           } 
          } 
         } 
         catch (Exception ex) 
         { 
          Label2.Text = "Insert Into: " + ex.ToString(); 
         } 
        } 
        conn.Close(); 
        cmd.Dispose(); 
        conn.Dispose(); 
       } 
      } 
     } 
     catch (Exception ex) 
     { 
      Label2.Text = "Access: " + ex.ToString(); 
     } 
    } 

Answer 1

的OleDbDataReader讓你處理一個SELECT查詢按行的結果通過排。正如documentation所示，您需要做的是這樣

OleDbDataReader reader = command.ExecuteReader(); 

while (reader.Read()) 
{ 
    Console.WriteLine(reader[0].ToString()); 
} 
reader.Close(); 

還要注意返回的行的數字索引是從零開始，所以第一列是reader[0]。