将数组字节转换为图像时发生未处理的错误

本文关键字：未处理 错误 图像 数组 字节 转换 | 更新日期: 2023-09-27 18:05:53

我已经完成了这个转换数组的字节在gridview的列之一到system.drawing.image得到了一个错误在这行

Image returnImage = Image.FromStream(ms);        
              argumentexception was unhandled 
              Parameter is not valid.

代码是这样的

private byte[] objtoarray(object obj)
{         
    if (obj == null)
        return null;
    BinaryFormatter bf = new BinaryFormatter();
    MemoryStream ms = new MemoryStream();
    bf.Serialize(ms, obj);
    return ms.ToArray();
}
public Image bytearraytoimage(byte[] bytearray)
{
    MemoryStream ms = new MemoryStream(bytearray,0,bytearray.Length);
    Image returnImage = Image.FromStream(ms);
    return returnImage;
}
private void productGridview_Cellclick(object sender, DataGridViewCellEventArgs e)
{
    byte[] bits = null;
    Image img = null;
    if (e.ColumnIndex != productgridview.Columns["productimage"].Index) return;
    if (productgridview.SelectedCells.Count == 0) return;
    object selectedValue = productgridview.SelectedCells[0].Value;
    bits= objtoarray(selectedValue);
    img = bytearraytoimage(bits);
    if (img is Image)
    {
        // Forms are IDisposable, so use them embedded in a using statement.
        using (ProductDescriptionForm pf = new ProductDescriptionForm())
        {
            pf.picture = (Image)selectedValue;
            pf.ShowDialog(this);
        }
    }      
}

将数组字节转换为图像时发生未处理的错误

文档声明ArgumentException可以在以下情况引发:

The stream does not have a valid image format
-or-
stream is null.

既然objtoarray可以返回null，那么productgridview.SelectedCells[0].Value是null还是无效值?

    object selectedValue = productgridview.SelectedCells[0].Value;
    bits= objtoarray(selectedValue);
相关文章：