從數據庫

Question

取圖片我有這樣的代碼從SQL Server 2008數據庫的顯示圖像到一個PictureBox

using (SqlCommand SqlCommand = new SqlCommand("Select * From Student Where StudentID = @a", myDatabaseConnection)) 
{ 
    SqlCommand.Parameters.AddWithValue("@a", SearchtextBox.Text); 

    DataSet DS = new DataSet(); 

    SqlDataAdapter da = new SqlDataAdapter(SqlCommand); 
    da.Fill(DS, "Images"); 

    dataGridView1.DataSource = DS.Tables[0]; 
    var imagesTable = DS.Tables["Images"]; 
    var imagesRows = imagesTable.Rows; 
    var count = imagesRows.Count; 

    if (count <= 0) 
     return; 

    var imageColumnValue = imagesRows[count - 1]["Image"]; 

    if (imageColumnValue == DBNull.Value) 
     return; 

    var data = (Byte[])imageColumnValue; 

    using (var stream = new MemoryStream(data)) 
    { 
     pictureBox1.Image = Image.FromStream(stream); 
    } 

但它顯示，即使我設置了BackgroundImageLayout伸展

我也沒有被拉伸的圖像嘗試這樣：

using (var stream = new MemoryStream(data)) 
{ 
    pictureBox1.Image = Image.FromStream(stream); 
    pictureBox1.BackgroundImageLayout = ImageLayout.Stretch; 
} 

Answer 1

你的問題是你混淆在一起PictureBox.Image和PictureBox.BackgroundImage之間，所以你的代碼應該是一個O F中的以下內容：

using (var stream = new MemoryStream(data)) 
{ 
    pictureBox1.BackgroundImage = Image.FromStream(stream); 
    pictureBox1.BackgroundImageLayout = ImageLayout.Stretch; 
} 

//or 

using (var stream = new MemoryStream(data)) 
{ 
    pictureBox1.Image = Image.FromStream(stream); 
    pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; 
}