Question

如果我想将多个对象插入SQL Server数据库，我似乎必须这样做：

    all_raw_images = []
    for content in itertools.islice(content,1,len(content)):
            image_id = content.split()[0]   
            driver_id = content.split()[2]
            camera_spec = content.split()[1] + content.split()[2]
            image_spec = [image_id,driver_id,camera_spec]

            image_folder_file = read_img_folders_file()[0]
            cam_spec=read_img_folders_file()[1]
            nb = read_img_folders_file()[2]
            image_path=''
            for i in range(nb-1):
                if cam_spec[i]== image_spec[2]:
                    image_path=image_folder_file[i]+'/'

            raw_image= image_path+str(image_id).zfill(10)+'.png' 
            all_raw_images.append(raw_image)

    return (all_raw_images)

把它放在一起让我把头发拉出来，我有一张28个字段的桌子。我必须分别写出4个单独的长列表，只有最微不足道的差异（DB字段名称可能使用不同的命名约定）。这看起来很疯狂;是否有更短的方式？

实体框架对我来说不是一个选项，这将是我的第一选择，我必须推出代码。

Answer 1

如果您完全反对使用外部库，那么这个怎么样？

void Insert (Dictionary <string, SqlType> cols, Object [] objects)
{
    string colNames = string.Join (",", cols.Keys);
    string paramNames = string.Join (",", cols.Keys.Select (c=>"@"+c));

    using (var command = new SqlCommand(@"INSERT INTO Table1 (" + colNames + 
           ") VALUES (" + paramNames + ")",conn))
    {
          foreach (var col in cols)
          {
             command.Params.Add("@" + col.Key, col.Value);
          }

          foreach(var o in objects)
          {
            // Here you would have to list them all unless
            // your object o is a Dictionary<string, object> or a DataRow.
            command.Params["@param1"].Value = o.Param1;
            command.Params["@param2"].Value = o.Param2;
            command.Params["@param3"].Value = o.Param3;
            ...
            command.ExecuteNonQuery();
          }
     }
}

INSERT INTO是否有一种不那么折磨的方式？

1 个答案: