winform 中如何将图片以二进制存到数据库中
最新回答
红酒高跟鞋
2025-03-01 05:43:12
//定义将图片转化为长二进制代码的函数getphoto()
public Byte[] getphoto(string photopath)
{
string str = photopath;
FileStream file = new FileStream(str, FileMode.Open, FileAccess.Read);
Byte[] bytBLOBData = new Byte[file.Length];
file.Read(bytBLOBData, 0, bytBLOBData.Length);
file.Close();
return bytBLOBData;
}//这是定义函数..
然后..就是将转换成二进制码的图片插入数据库中..下面是简单的也是重要的sql语句..
if (this.pictureBox1.Image != null)
{
sql1 = sql1 + ",Photo";
sql2 = sql2 + ",bytBLOBData";
Byte[] bytBLOBData = getphoto(openFileDialog1.FileName);
cmd.Parameters.Add(new OleDbParameter("jpeg", OleDbType.Binary, bytBLOBData.Length, ParameterDirection.Input, true, 0, 0, null, DataRowVersion.Default, bytBLOBData));
}
接下来..是读取...
string sql = "select photo from studentinfo where studentid = " + this.Tag.ToString();
OleDbCommand cmd = new OleDbCommand(sql, connection1);
if (Convert.DBNull != cmd.ExecuteScalar())
pictureBox1.Image = Image.FromStream(new MemoryStream((Byte[])cmd.ExecuteScalar()));//读取长二进制为图片..
魔謉★鱼丨
2025-03-01 03:53:02
暗中人
2025-03-01 03:47:51
白日依山尽
2025-03-01 01:51:09
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