SqlServer数据类型、C#SqlDbType对应关系及转换

 1 // SqlDbType转换为C#数据类型 2 public static Type SqlType2CsharpType(SqlDbType sqlType) 3 { 4 switch (sqlType) 5 { 6        case SqlDbType.BigInt: 7          return typeof(Int64); 8        case SqlDbType.Binary: 9          return typeof(Object);10        case SqlDbType.Bit:11          return typeof(Boolean);12        case SqlDbType.Char:13          return typeof(String);14        case SqlDbType.DateTime:15          return typeof(DateTime);16        case SqlDbType.Decimal:17          return typeof(Decimal);18        case SqlDbType.Float:19          return typeof(Double);20        case SqlDbType.Image:21          return typeof(Object);22        case SqlDbType.Int:23          return typeof(Int32);24        case SqlDbType.Money:25          return typeof(Decimal);26        case SqlDbType.NChar:27          return typeof(String);28        case SqlDbType.NText:29          return typeof(String);30        case SqlDbType.NVarChar:31          return typeof(String);32        case SqlDbType.Real:33          return typeof(Single);34        case SqlDbType.SmallDateTime:35          return typeof(DateTime);36        case SqlDbType.SmallInt:37          return typeof(Int16);38        case SqlDbType.SmallMoney:39          return typeof(Decimal);40        case SqlDbType.Text:41          return typeof(String);42        case SqlDbType.Timestamp:43          return typeof(Object);44        case SqlDbType.TinyInt:45          return typeof(Byte);46        case SqlDbType.Udt://自定义的数据类型47          return typeof(Object);48        case SqlDbType.UniqueIdentifier:49          return typeof(Object);50        case SqlDbType.VarBinary:51          return typeof(Object);52        case SqlDbType.VarChar:53          return typeof(String);54        case SqlDbType.Variant:55          return typeof(Object);56        case SqlDbType.Xml:57          return typeof(Object);58        default:59          return null;60 }61 }

 1 // sql server数据类型（如：varchar） 2 // 转换为SqlDbType类型 3 public static SqlDbType SqlTypeString2SqlType(string sqlTypeString) 4 { 5 SqlDbType dbType = SqlDbType.Variant;//默认为Object 6  7 switch (sqlTypeString) 8 { 9        case "int":10          dbType = SqlDbType.Int;11          break;12        case "varchar":13          dbType = SqlDbType.VarChar;14          break;15        case "bit":16          dbType = SqlDbType.Bit;17          break;18        case "datetime":19          dbType = SqlDbType.DateTime;20          break;21        case "decimal":22          dbType = SqlDbType.Decimal;23          break;24        case "float":25          dbType = SqlDbType.Float;26          break;27        case "image":28          dbType = SqlDbType.Image;29          break;30        case "money":31          dbType = SqlDbType.Money;32          break;33        case "ntext":34          dbType = SqlDbType.NText;35          break;36        case "nvarchar":37          dbType = SqlDbType.NVarChar;38          break;39        case "smalldatetime":40          dbType = SqlDbType.SmallDateTime;41          break;42        case "smallint":43          dbType = SqlDbType.SmallInt;44          break;45        case "text":46          dbType = SqlDbType.Text;47          break;48        case "bigint":49          dbType = SqlDbType.BigInt;50          break;51        case "binary":52          dbType = SqlDbType.Binary;53          break;54        case "char":55          dbType = SqlDbType.Char;56          break;57        case "nchar":58          dbType = SqlDbType.NChar;59          break;60        case "numeric":61          dbType = SqlDbType.Decimal;62          break;63        case "real":64          dbType = SqlDbType.Real;65          break;66        case "smallmoney":67          dbType = SqlDbType.SmallMoney;68          break;69        case "sql_variant":70          dbType = SqlDbType.Variant;71          break;72        case "timestamp":73          dbType = SqlDbType.Timestamp;74          break;75        case "tinyint":76          dbType = SqlDbType.TinyInt;77          break;78        case "uniqueidentifier":79          dbType = SqlDbType.UniqueIdentifier;80          break;81        case "varbinary":82          dbType = SqlDbType.VarBinary;83          break;84        case "xml":85          dbType = SqlDbType.Xml;86          break;87 }88 return dbType;89 }

 1 // sql server中的数据类型，转换为C#中的类型类型 2 public static Type SqlTypeString2CsharpType(string sqlTypeString) 3 { 4 SqlDbType dbTpe = SqlTypeString2SqlType(sqlTypeString); 5  6 return SqlType2CsharpType(dbTpe); 7 } 8  9 // 将sql server中的数据类型，转化为C#中的类型的字符串10 public static string SqlTypeString2CsharpTypeString(string sqlTypeString)11 {12 Type type = SqlTypeString2CsharpType(sqlTypeString);13 14 return type.Name;15 }

原文链接：http://www.cnblogs.com/Relict/archive/2011/12/19/2293460.html