来自Windows窗体（C＃）中存储在数据库（sqlite）中的图像路径的datagridview中的图像显示问题

Question

I am working C# desktop application with sqlite. Store Image path properly as

like C:\\Users\\USER\\Pictures\\pms_1484911839.45213251.jpg .

And I want to display the images in datagridview. My Code

private void loadTable(){
conn.Open();
SQLiteDataAdapter dataAdapter = new SQLiteDataAdapter("SELECT * FROM products", conn);
DataTable dt = new DataTable();
dataAdapter.Fill(dt);
foodListView.AutoGenerateColumns = false;
foodListView.AllowUserToAddRows = false;
foodListView.RowHeadersVisible = false;
foodListView.DataSource = dt;

DataGridViewImageColumn imageColumn = new DataGridViewImageColumn();
Image img;
int i = 0;
imageColumn.HeaderText = "Image";
imageColumn.Name = "image";
foodListView.Columns.Insert(3, imageColumn);

foreach (DataRow dr in dt.Rows)
{
    img = Image.FromFile(@dr["image"].ToString());
    foodListView.Rows[i].Cells["image"].Value = img;
    i++;
}

conn.Close();}

My Output is like

Where is my problem. Thank you.

Answer 1

//foreach (DataRow dr in dt.Rows)
//{
//    img = Image.FromFile(@dr["image"].ToString());
//    foodListView.Rows[i].Cells["image"].Value = img;
//    i++;
//}
foodListView.CellFormatting += foodListView_CellFormatting;



 private void foodListView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
    {
        if (foodListView.Columns[e.ColumnIndex].Name == "image")
        {
            e.Value = Bitmap.FromFile(e.Value.ToString());
            e.FormattingApplied = true;
        }
    }

try to apply cellformatting. make sure column is mapped with respective field.

Answer 2

If you want to load image from aa file into the DataGridView (in your case the path of the file is in the database) , then here's a sample code :

  Bitmap img;
  img = new Bitmap(dr[3].ToString); ////change column index as required
  DataGridViewImageColumn imageColumn = new DataGridViewImageColumn();
  ////other codes here 
  dgv.Rows[0].Cells[3].Value = img;

Hope this helps :)

Answer 3

Actually the code in the above working absolutely fine. But the problem was I call loadTable() before the form loaded. That's why the function creates image dispay issue. When I call the function after the form load images load properly. Thank you everyone.