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