图片保存到数据库的方法:
Code
public void imgToDB(string sql)
{ //参数sql中要求保存的imge变量名称为@images
//调用方法如:imgToDB("update UserPhoto set Photo=@images where UserNo='" + temp + "'");
FileStream fs = File.OpenRead(t_photo.Text);
byte[] imageb = new byte[fs.Length];
fs.Read(imageb, 0, imageb.Length);
fs.Close();
SqlCommand com3 = new SqlCommand (sql,con);
com3.Parameters.Add("@images", SqlDbType.Image).Value = imageb;
if (com3.Connection.State == ConnectionState.Closed)
com3.Connection.Open();
try
{
com3.ExecuteNonQuery();
}
catch
{ }
finally
{ com3.Connection.Close(); }
public void imgToDB(string sql)
{ //参数sql中要求保存的imge变量名称为@images
//调用方法如:imgToDB("update UserPhoto set Photo=@images where UserNo='" + temp + "'");
FileStream fs = File.OpenRead(t_photo.Text);
byte[] imageb = new byte[fs.Length];
fs.Read(imageb, 0, imageb.Length);
fs.Close();
SqlCommand com3 = new SqlCommand (sql,con);
com3.Parameters.Add("@images", SqlDbType.Image).Value = imageb;
if (com3.Connection.State == ConnectionState.Closed)
com3.Connection.Open();
try
{
com3.ExecuteNonQuery();
}
catch
{ }
finally
{ com3.Connection.Close(); }
数据库中读出图片并显示在picturebox中:
方法一:
Code
private void ShowImage(string sql)
{
//调用方法如:ShowImage("select Photo from UserPhoto where UserNo='" + userno +"'");
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
byte[] b= (byte[])cmd.ExecuteScalar();
if (b.Length 〉 0)
{
MemoryStream stream = new MemoryStream(b, true);
stream.Write(b, 0, b.Length);
pictureBox1.Image = new Bitmap(stream);
stream.Close();
}
conn.Close();
private void ShowImage(string sql)
{
//调用方法如:ShowImage("select Photo from UserPhoto where UserNo='" + userno +"'");
SqlCommand cmd = new SqlCommand(sql, conn);
conn.Open();
byte[] b= (byte[])cmd.ExecuteScalar();
if (b.Length 〉 0)
{
MemoryStream stream = new MemoryStream(b, true);
stream.Write(b, 0, b.Length);
pictureBox1.Image = new Bitmap(stream);
stream.Close();
}
conn.Close();
方法二:当在dg中选中某行时:
Code