SQL Server类型与C#类型对应关系

/ SqlDbType转换为C#数据类型 public static Type SqlType2CsharpType(SqlDbType sqlType) { switch (sqlType) {        case SqlDbType.BigInt:          return typeof(Int64);        case SqlDbType.Binary:          return typeof(Object);        case SqlDbType.Bit:          return typeof(Boolean);        case SqlDbType.Char:          return typeof(String);        case SqlDbType.DateTime:          return typeof(DateTime);        case SqlDbType.Decimal:          return typeof(Decimal);        case SqlDbType.Float:          return typeof(Double);        case SqlDbType.Image:          return typeof(Object);        case SqlDbType.Int:          return typeof(Int32);        case SqlDbType.Money:          return typeof(Decimal);        case SqlDbType.NChar:          return typeof(String);        case SqlDbType.NText:          return typeof(String);        case SqlDbType.NVarChar:          return typeof(String);        case SqlDbType.Real:          return typeof(Single);        case SqlDbType.SmallDateTime:          return typeof(DateTime);        case SqlDbType.SmallInt:          return typeof(Int16);        case SqlDbType.SmallMoney:          return typeof(Decimal);        case SqlDbType.Text:          return typeof(String);        case SqlDbType.Timestamp:          return typeof(Object);        case SqlDbType.TinyInt:          return typeof(Byte);        case SqlDbType.Udt://自定义的数据类型          return typeof(Object);        case SqlDbType.UniqueIdentifier:          return typeof(Object);        case SqlDbType.VarBinary:          return typeof(Object);        case SqlDbType.VarChar:          return typeof(String);        case SqlDbType.Variant:          return typeof(Object);        case SqlDbType.Xml:          return typeof(Object);        default:          return null; } }
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代码:
// sql server数据类型（如：varchar） // 转换为SqlDbType类型 public static SqlDbType SqlTypeString2SqlType(string sqlTypeString) { SqlDbType dbType = SqlDbType.Variant;//默认为Object
switch (sqlTypeString) {        case "int":          dbType = SqlDbType.Int;          break;        case "varchar":          dbType = SqlDbType.VarChar;          break;        case "bit":          dbType = SqlDbType.Bit;          break;        case "datetime":          dbType = SqlDbType.DateTime;          break;        case "decimal":          dbType = SqlDbType.Decimal;          break;        case "float":          dbType = SqlDbType.Float;          break;        case "image":          dbType = SqlDbType.Image;          break;        case "money":          dbType = SqlDbType.Money;          break;        case "ntext":          dbType = SqlDbType.NText;          break;        case "nvarchar":          dbType = SqlDbType.NVarChar;          break;        case "smalldatetime":          dbType = SqlDbType.SmallDateTime;          break;        case "smallint":          dbType = SqlDbType.SmallInt;          break;        case "text":          dbType = SqlDbType.Text;          break;        case "bigint":          dbType = SqlDbType.BigInt;          break;        case "binary":          dbType = SqlDbType.Binary;          break;        case "char":          dbType = SqlDbType.Char;          break;        case "nchar":          dbType = SqlDbType.NChar;          break;        case "numeric":          dbType = SqlDbType.Decimal;          break;        case "real":          dbType = SqlDbType.Real;          break;        case "smallmoney":          dbType = SqlDbType.SmallMoney;          break;        case "sql_variant":          dbType = SqlDbType.Variant;          break;        case "timestamp":          dbType = SqlDbType.Timestamp;          break;        case "tinyint":          dbType = SqlDbType.TinyInt;          break;        case "uniqueidentifier":          dbType = SqlDbType.UniqueIdentifier;          break;        case "varbinary":          dbType = SqlDbType.VarBinary;          break;        case "xml":          dbType = SqlDbType.Xml;          break; } return dbType; }
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代码:

// sql server中的数据类型，转换为C#中的类型类型 public static Type SqlTypeString2CsharpType(string sqlTypeString) { SqlDbType dbTpe = SqlTypeString2SqlType(sqlTypeString);
return SqlType2CsharpType(dbTpe); }
// 将sql server中的数据类型，转化为C#中的类型的字符串 public static string SqlTypeString2CsharpTypeString(string sqlTypeString) { Type type = SqlTypeString2CsharpType(sqlTypeString);
return type.Name; }

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