/// <summary>
/// 将SQLServer数据类型（如：varchar）转换为.Net类型（如：String）
/// </summary>
/// <param name="sqlTypeString">SQLServer数据类型</param>
/// <returns></returns>
public static string SqlTypeName2DotNetType(string sqlTypeString)
{
   string[] SqlTypeNames = new string[] { "int", "varchar","bit" ,"datetime","decimal","float","image","money",
   "ntext","nvarchar","smalldatetime","smallint","text","bigint","binary","char","nchar","numeric",
   "real","smallmoney", "sql_variant","timestamp","tinyint","uniqueidentifier","varbinary"};
   
   string[] DotNetTypes = new string[] {"int", "string","bool" ,"DateTime","Decimal","Double","Byte[]","Single",
   "string","string","DateTime","Int16","string","Int64","Byte[]","string","string","Decimal",
   "Single","Single", "Object","Byte[]","Byte","Guid","Byte[]"};
   
   int i = Array.IndexOf(SqlTypeNames, sqlTypeString.ToLower());
   
   return DotNetTypes[i];
}

// 来源:www.CSFramework.com, C/S结构框架学习网