C#:向SqlServer数据库中插入imange类型
浏览数：34 /
时间：2015年06月12日
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using
System;using
System.Collections.Generic;using
System.Linq;using
System.Runtime.InteropServices;using
System.Text;namespace
Common{ public
class ConvertData { /// <summary> /// 构造函数 /// </summary> public
ConvertData() { } /// <summary> /// 将byte[]数组转换为double[]数组 /// </summary> /// <param name="b"></param> /// <returns></returns> public
double[] BytesToDoubles(byte[] b) { // Initialize unmanged memory to hold the array. int
size = Marshal.SizeOf(b[0]) * b.Length; IntPtr pnt = Marshal.AllocHGlobal(size); try { // Copy the array to unmanaged memory. Marshal.Copy(b, 0, pnt, b.Length); // Copy the unmanaged array back to another managed array. double[] managedArray2 = new
double[b.Length / 8]; Marshal.Copy(pnt, managedArray2, 0, b.Length / 8); return
managedArray2; } finally { // Free the unmanaged memory. Marshal.FreeHGlobal(pnt); } } /// <summary> /// 获取内存中double[]，并转换为String字符串 /// </summary> /// <param name="b"></param> /// <returns></returns> public
string DoublesToString(double[] doubleArray) { string
values = ""; for
(int
i = 0; i < doubleArray.Length; i++) { values += doubleArray[i] + ","; } return
values; } /// <summary> /// 获取内存中double[]，并转换为String字符串 /// </summary> /// <param name="b"></param> /// <returns></returns> public
string BytesToString(byte[] b) { double[] doubleArray = BytesToDoubles(b); return
DoublesToString(doubleArray); } /// <summary> /// 获取内存中double[]，并转换为String字符串 /// </summary> /// <param name="b"></param> /// <returns></returns> public
string GetByteToDouble(byte[] b) { // Initialize unmanged memory to hold the array. int
size = Marshal.SizeOf(b[0]) * b.Length; IntPtr pnt = Marshal.AllocHGlobal(size); string
values = ""; try { // Copy the array to unmanaged memory. Marshal.Copy(b, 0, pnt, b.Length); // Copy the unmanaged array back to another managed array. double[] managedArray2 = new
double[b.Length / 8]; Marshal.Copy(pnt, managedArray2, 0, b.Length / 8); for
(int
i = 0; i < managedArray2.Length; i++) { values += managedArray2[i] + ","; } } finally { // Free the unmanaged memory. Marshal.FreeHGlobal(pnt); } return
values; } /// <summary> /// 将double[]数组转换为byte[]数组 /// </summary> /// <param name="d"></param> /// <returns></returns> public
byte[] DoublesToBytes(double[] d) { int
size = Marshal.SizeOf(d[0]) * d.Length; IntPtr pnt = Marshal.AllocHGlobal(size); try { // Copy the array to unmanaged memory. Marshal.Copy(d, 0, pnt, d.Length); // Copy the unmanaged array back to another managed array. byte[] managedArray2 = new
byte[d.Length * 8]; Marshal.Copy(pnt, managedArray2, 0, d.Length * 8); return
managedArray2; } finally { // Free the unmanaged memory. Marshal.FreeHGlobal(pnt); } } }} |
调用：
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public
int InsertWSWSUH(string
wscd, int
uintv, int
udrp, string
unitnm, int
usteps, double[] uhdata, double
mfp,/*datetime,*/int
nsteps) //// <param name="datetime">时间戳</param> { string
sqlStr = "Insert into [HyModelDB_new].[dbo].[FFM_WSWSUH_B] ([WSCD],[UINTV],[UDRP],[UNITNM] ,[USTEPS] ,[UHDATA],[MFP],[DATETM],[NSTEPS]) values (‘"
+ wscd + "‘,"
+ uintv + ","
+ udrp + ",‘"
+ unitnm + "‘,"
+ usteps + ","
+ "@unitData"
+ ","
+ mfp + ","
+ "@dateTime"
+ ","
+ nsteps + ")"; SqlParameter[] parameters = { new
SqlParameter("@unitData", SqlDbType.Image), new
SqlParameter("@dateTime", SqlDbType.DateTime)}; parameters[0].Value = ConvertData.DoublesToBytes(uhdata); parameters[1].Value = DateTime.Now.ToString("yyyy-MM-dd"); return
db.ExecuteSql(sqlStr); } |
参考代码：
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/// <summary> /// 增加一条数据 /// </summary> public
int Add(OA.Model.InformationOfDoc model) { StringBuilder strSql=new
StringBuilder(); strSql.Append("insert into InformationOfDoc("); strSql.Append("DocName,DocType,RwID,RWType,RWClass,Execution,DocBLOB,DocAttribute,CreateYMD,Remark)"); strSql.Append(" values ("); strSql.Append("@DocName,@DocType,@RwID,@RWType,@RWClass,@Execution,@DocBLOB,@DocAttribute,@CreateYMD,@Remark)"); strSql.Append(";select @@IDENTITY"); SqlParameter[] parameters = { new
SqlParameter("@DocName", SqlDbType.VarChar,40), new
SqlParameter("@DocType", SqlDbType.VarChar,100), new
SqlParameter("@RwID", SqlDbType.VarChar,18), new
SqlParameter("@RWType", SqlDbType.Char,10), new
SqlParameter("@RWClass", SqlDbType.Char,4), new
SqlParameter("@Execution", SqlDbType.Char,6), new
SqlParameter("@DocBLOB", SqlDbType.Image), new
SqlParameter("@DocAttribute", SqlDbType.Char,6), new
SqlParameter("@CreateYMD", SqlDbType.Date,3), new
SqlParameter("@Remark", SqlDbType.VarChar,200)}; parameters[0].Value = model.DocName; parameters[1].Value = model.DocType; parameters[2].Value = model.RwID; parameters[3].Value = model.RWType; parameters[4].Value = model.RWClass; parameters[5].Value = model.Execution; parameters[6].Value = model.DocBLOB; parameters[7].Value = model.DocAttribute; parameters[8].Value = model.CreateYMD; parameters[9].Value = model.Remark; object
obj = DbHelperSQL.GetSingle(strSql.ToString(),parameters); if
(obj == null) { return
0; } else { return
Convert.ToInt32(obj); } } |
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