无法将类型为“System.Drawing.Bitmap”的对象强制转换为“System.Byte []”。 [英] Unable to cast object of type 'System.Drawing.Bitmap' to type 'System.Byte[]'.

问题描述

您好，



我正在使用此代码在databox中从datagridview单元格点击事件中显示图像，但它收到错误： -

当控件受数据绑定时，无法以编程方式将行添加到DataGridView的行集合中。

Hello,

I am using this code for image display in picturebox from datagridview cell click event but it's getting error:-
Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound.

private void dgvDisplayTiles_CellClick(object sender, DataGridViewCellEventArgs e)
        {
try
            {
                //Get image data from gridview column.
                txtTileName.Text = dgvDisplayTiles.CurrentRow.Cells[2].Value.ToString();
                cmbtilecategory.Text = dgvDisplayTiles.CurrentRow.Cells[1].Value.ToString();
                lblTileID.Text = dgvDisplayTiles.CurrentRow.Cells[0].Value.ToString();
                byte[] imageData = (byte[])dgvDisplayTiles.CurrentRow.Cells[3].Value;//Error
                i = e.RowIndex;
                //Initialize image variable
                Image newImage;
                //Read image data into a memory stream
                using (MemoryStream ms = new MemoryStream(imageData, 0, imageData.Length))
                {
                    ms.Write(imageData, 0, imageData.Length);

                    //Set image variable value using memory stream.
                    newImage = Image.FromStream(ms, true);
                }

                //set picture for preview
                picTextureDisplay1.Image = newImage;

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }}

请帮帮我。



谢谢提前。



Ankit Agarwal

软件工程师

Please help me.

Thanks in Advance.

Ankit Agarwal
Software Engineer

推荐答案

看到这个article



C＃Image to Byte Array和Byte Array to Image Converter Class [ ^ ]

see this article

C# Image to Byte Array and Byte Array to Image Converter Class[^]

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