SQLCommand拋出new NotImplementedException（）;

Question

嗨，我試圖將一組文本框的值存儲到一個SQL數據庫中，我已經創建了數據庫並編寫了SQL腳本。我創建從我的項目時，腳本運行，我得到

型「System.NotImplementedException」未處理的異常發生在> PLUPROG.exe

附加信息錯誤到SQL數據庫的連接：該方法或操作未實現。

由...寄存。

public static implicit operator SqlCommand(Sqlcommand v) 
    { 

     throw new NotImplementedException(); 
    } 

我的SQL腳本的代碼是

private void btnAddPlu_Click(object sender, EventArgs e) 
    { 
     using (SqlConnection sqlConn = new SqlConnection("Data Source = (localdb)\\MSSQLLocalDB; Initial Catalog = PluProg; Integrated Security = True")) 
     { 
      string query = "INSERT INTO Departments VALUES (@Name, @Type, @SubDept)"; 
      SqlCommand cmd = new Sqlcommand(query, sqlConn); 
      cmd.Parameters.Add("@name", SqlDbType.NVarChar, 50).Value = cbDeptName.Text; 
      cmd.Parameters.Add("@Type", SqlDbType.NVarChar, 50).Value = cbDeptType.Text; 
      cmd.Parameters.Add("@SubDept", SqlDbType.NVarChar, 50).Value = cbSubDept.Text; 
      cmd.Connection.Open(); 

      try 
      { 
       cmd.ExecuteNonQuery(); 
      } 
      catch() 

Answer 1

我真的不知道你在問什麼，但我覺得不好，你問過兩次，顯然還沒有想出任何東西。看看這個，看看有什麼回答你的問題。以下是不優化/一般化 - 只是基本的東西，讓你看看你自己的方式是什麼和改進。

public SqlConnection getConn() 
    { 
     return new SqlConnection(getConnString()); 
    } 
    public string getConnString() 
    { 
     return @"Data Source=lily.arvixe.com;Initial Catalog=WM_Crawler;Persist Security Info=True;User ID={myUser};Password={MyPass};Connection Timeout=7000"; 
    } 
//This is how you flush a DataTable 
public void saveDataTable(string tableName, DataTable table) 
    { 

     using (SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      using (var bulkCopy = new SqlBulkCopy(conn))//, SqlBulkCopyOptions.KeepIdentity)) 
      { 
       // my DataTable column names match my SQL Column names, so I simply made this loop. However if your column names don't match, just pass in which datatable name matches the SQL column name in Column Mappings 
       foreach (DataColumn col in table.Columns) 
       { 
        bulkCopy.ColumnMappings.Add(col.ColumnName, "["+col.ColumnName+"]"); 
       } 
       bulkCopy.BulkCopyTimeout = 8000; 
       bulkCopy.DestinationTableName = tableName; 
       bulkCopy.BatchSize = 10000; 
       bulkCopy.EnableStreaming = true; 
       //bulkCopy.SqlRowsCopied += BulkCopy_SqlRowsCopied; 
       //bulkCopy.NotifyAfter = 10000; 
       bulkCopy.WriteToServer(table); 
      } 
      conn.Close(); 
     } 
    } 
    //this is how you select one field from one row 
    public object scalar(string sql) 
    { 
     object ret; 
     using (SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      using (SqlCommand com = conn.CreateCommand()) 
      { 
       com.CommandText = sql; 
       ret = com.ExecuteScalar(); 
      } 
      conn.Close(); 

     } 
     return ret; 
    } 
    //this is how you execute a command using SQL string (admin functions) 
    public void nonQuery(string sql) 
    { 
     using(SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      using(SqlCommand com = conn.CreateCommand()) 
      { 
       com.CommandText = sql; 
       com.CommandTimeout = 5900; 
       com.ExecuteNonQuery(); 
      } 
      conn.Close(); 

     } 

    } 
    // This is how you execute a query using a predefined, parameterized command (user input) 
    public void nonQuery_With_Command(SqlCommand com) 
    { 
     using (SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      using (com) 
      { 
       com.Connection = conn; 
       com.ExecuteNonQuery(); 
      } 
      conn.Close(); 

     } 

    } 
    //this is how you execute several commands under one connection (sql or stored procedure) 
    public void nonQuery_List_Command(List<SqlCommand> comList) 
    { 
     using (SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      foreach (SqlCommand com in comList) 
      { 
       using (com) 
       { 
        com.Connection = conn; 
        try 
        { 
         com.ExecuteNonQuery(); 
        } 
        catch(Exception n1) 
        { 
         Console.WriteLine(n1.Message); 
         Console.WriteLine(com.Parameters[1].Value.ToString()); 
        } 
       } 
       } 
      conn.Close(); 

     } 

    } 
    //This returns column names from a specific table (example of a datareader) 
    private List<string> get_Column_Names(string tableName) 
    { 
     List<string> ret = new List<string>(); 
     using (SqlConnection conn = getConn()) 
     { 
      conn.Open(); 
      using(SqlCommand com = conn.CreateCommand()) 
      { 
       com.CommandText = "select column_Name from INFORMATION_SCHEMA.COLUMNS where table_Name = '" + tableName + "'"; 
       com.CommandTimeout = 600; 
       SqlDataReader read = com.ExecuteReader(); 
       while (read.Read()) 
       { 
        ret.Add(Convert.ToString(read[0])); 
       } 
      } 
      conn.Close(); 
     } 
     return ret; 
    } 
    //This converts a reader to a class using fields. It is not optimized and is inefficient, but allows you to see what's happening. Yu can optimize it yourself 
    public static object[] sql_Reader_To_Type(Type t, SqlDataReader r) 
    { 
     List<object> ret = new List<object>(); 
     while (r.Read()) 
     { 
      FieldInfo[] f = t.GetFields(); 
      object o = Activator.CreateInstance(t); 
      for (int i = 0; i < f.Length; i++) 
      { 
       string thisType = f[i].FieldType.ToString(); 
       switch (thisType) 
       { 
        case "System.String": 

         f[i].SetValue(o, Convert.ToString(r[f[i].Name])); 
         break; 
        case "System.Int16": 
         f[i].SetValue(o, Convert.ToInt16(r[f[i].Name])); 
         break; 
        case "System.Int32": 
         f[i].SetValue(o, Convert.ToInt32(r[f[i].Name])); 
         break; 
        case "System.Int64": 
         f[i].SetValue(o, Convert.ToInt64(r[f[i].Name])); 
         break; 
        case "System.Double": 
         double th; 
          if (r[f[i].Name].GetType() == typeof(DBNull)) 
          { 
           th = 0; 
          } 
          else 
          { 
           th = Convert.ToDouble(r[f[i].Name]); 
          } 
         } 
         try { f[i].SetValue(o, th); } 
         catch (Exception e1) 
         { 
          throw new Exception("can't convert " + f[i].Name + " to double - value =" + th); 
         } 
         break; 
        case "System.Boolean": 
         f[i].SetValue(o, Convert.ToInt32(r[f[i].Name]) == 1 ? true : false); 
         break; 
        case "System.DateTime": 
         f[i].SetValue(o, Convert.ToDateTime(r[f[i].Name])); 
         break; 
        default: 
         throw new Exception("Missed data type in sql select "); 

       } 
      } 
      ret.Add(o); 

     } 
     return ret.ToArray(); 


    } 
    //these are basic (rudimentary) ways of converting class to DataTable 
    public static DataTable create_DataTable_From_Generic_Class(Type t) 
    { 
     DataTable d = new DataTable(); 
     PropertyInfo[] pI = t.GetProperties(); 
     for (int i = 0; i < pI.Length; i++) 
     { 

      DataColumn dC = new DataColumn(pI[i].Name, pI[i].PropertyType); 
      d.Columns.Add(dC); 

     } 
     return d; 
    } 
    public static object[] Create_Datatable_Row_From_Generic_Class(Type t, object instance, DataTable dt) 
    { 
     PropertyInfo[] p = t.GetProperties(); 
     object[] ret = new object[dt.Columns.Count]; 
     for (int i = 0; i < dt.Columns.Count; i++) 
     { 
      var temp = t.GetProperty(dt.Columns[i].ColumnName); 
      ret[i] = temp.GetValue(instance); 

     } 
     return ret; 

    }