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//将一个图片文件转换为字节流存入数据库
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string pictureFilePath = "";
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Byte[] bt;
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pictureFilePath = @"C:\temp.bmp";
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FileStream fs = new FileStream(pictureFilePath,FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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bt = new byte[Int32.Parse(fs.Length.ToString())];
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fs.Read(bt,0,Int32.Parse(fs.Length.ToString()));
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sqlComm.Parameters.Add("@CMPicture",bt);
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