sqlserver与c#中数据类型的对应关系

///
/// 数据库中与c#中的数据类型对照
///
///   private string changetocsharptype(string type)
{
   string reval=string.empty;
   switch(type.tolower())
   {
    case "int":
     reval= "int32";
     break;
    case "text":
     reval= "string";
     break;
    case "bigint":
     reval= "int64";
     break;
    case "binary":
     reval= "system.byte[]";
     break;
    case "bit":      // 0为false
     reval= "boolean";
     break;
    case "char":
     reval= "string";
     break;
    case "datetime":
     reval= "system.datetime";
     break;
    case "decimal":
     reval= "system.decimal";
     break;
    case "float":
     reval= "system.double";
     break;
    case "image":
     reval= "system.byte[]";
     break;
    case "money":
     reval= "system.decimal";
     break;
    case "nchar":
     reval= "string";
     break;
    case "ntext":
     reval= "string";
     break;
    case "numeric":
     reval= "system.decimal";
     break;
    case "nvarchar":
     reval= "string";
     break;
    case "real":
     reval= "system.single";
     break;
    case "smalldatetime":
     reval= "system.datetime";
     break;
    case "smallint":
     reval= "int16";
     break;
    case "smallmoney":
     reval= "system.decimal";
     break;
    case "timestamp":
     reval= "system.datetime";
     break;
    case "tinyint":
     reval= "system.byte";
     break;
    case "uniqueidentifier":
     reval= "system.guid";
     break;
    case "varbinary":
     reval= "system.byte[]";
     break;
    case "varchar":
     reval= "string";
     break;
    case "variant":
     reval="object";
     break;
    default:
     reval= "string";
     break;
   }
   return reval;
}