DataGridViewImageColumn不显示值-为什么

本文关键字:为什么 显示 DataGridViewImageColumn | 更新日期: 2023-09-27 18:12:15

我想在我的dataGridView中显示一些图像,所以我用默认图像(Properties.Resources.test)创建了DataGridViewImageColumn,将其添加到dataGridView并尝试向单元格插入一些值。不幸的是,它并没有改变显示屏。我做错了什么?

        var q = from a in _dc.GetTable<Map>() select a;
        View.dataGridView1.DataSource = q;
        View.dataGridView1.Columns[3].Visible = false;
        var imageColumn = new DataGridViewImageColumn
        {
            Image = Properties.Resources.test,
            ImageLayout = DataGridViewImageCellLayout.Stretch,
            Name = "Map",
            HeaderText = @"map"
        };
        View.dataGridView1.Columns.Add(imageColumn);
        var i = 0;
        foreach (var map in q)
        {
            View.dataGridView1.Rows[i].Cells[8].Value = ByteArrayToImage(map.map1.ToArray());
            i++;
        }

DataGridViewImageColumn不显示值-为什么

正如评论中的问题所解释的那样,您需要像这样使用CellFormatting事件:

void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) 
{             
    if (dataGridView1.Columns[e.ColumnIndex].Name == "StatusImage") 
    { 
        // Your code would go here - below is just the code I used to test 
        e.Value = Image.FromFile(@"C:'Pictures'TestImage.jpg"); 
    } 
} 

所以设置e值而不是单元格。

你可以这样做…

 for(int i = 0; i < dataGridView1.Columns.Count; i ++)
            if(dataGridView1.Columns[i] is DataGridViewImageColumn) {
                ((DataGridViewImageColumn)dataGridView1.Columns[i]).ImageLayout = DataGridViewImageCellLayout.Stretch;
                break;
            }