How Can I Store and Retrieve Images Using MySQL?

Using MySQL to Store and Retrieve Images

Saving an Image to the Database

To successfully save an image to a MySQL database, ensure that the following code is implemented:

<br>Dim filename As String = txtName.Text   ".jpg"<br>Dim FileSize As UInt32</p>
<p>conn.Close()</p>
<p>Dim mstream As New System.IO.MemoryStream()<br>PbPicture.Image.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg)<br>Dim arrImage() As Byte = mstream.GetBuffer()</p>
<p>FileSize = mstream.Length<br>Dim sqlcmd As New MySqlCommand<br>Dim sql As String<br>mstream.Close()</p>
<p>sql = "insert into [your table]  (picture, filename, filesize)</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">                           VALUES(@File, @FileName, @FileSize)"

Copy after login

Try

conn.Open()
With sqlcmd
    .CommandText = sql
    .Connection = conn
    .Parameters.AddWithValue("@FileName", filename)
    .Parameters.AddWithValue("@FileSize", FileSize)
    .Parameters.AddWithValue("@File", arrImage)

    .ExecuteNonQuery()
End With

Catch ex As Exception

MsgBox(ex.Message)

Finally

conn.Close()

End Try

Retrieving an Image from the Database

To display an image from the database in a PictureBox, use the following code:

<br>Dim adapter As New MySqlDataAdapter<br>adapter.SelectCommand = Cmd</p>
<p>data = New DataTable</p>
<p>adapter = New MySqlDataAdapter("select picture from [yourtable]", conn)</p>
<p>commandbuild = New MySqlCommandBuilder(adapter)<br>adapter.Fill(data)</p>
<p>Dim lb() As Byte = data.Rows(0).Item("picture")<br>Dim lstr As New System.IO.MemoryStream(lb)<br>PbPicture.Image = Image.FromStream(lstr)<br>PbPicture.SizeMode = PictureBoxSizeMode.StretchImage<br>lstr.Close()<br>

By implementing this code, you can store and retrieve images to and from a MySQL database successfully.

The above is the detailed content of How Can I Store and Retrieve Images Using MySQL?. For more information, please follow other related articles on the PHP Chinese website!