winform 中显示异步下载的图片

2024-03-17 20:35:05 549

privatevoiddataGridView1_RowsAdded(objectsender,DataGridViewRowsAddedEventArgse) { ////利用WebClient来下载图片 using(WebClientwc=newWebClient()) { ////WebClient下载完毕的响应事件绑定 wc.DownloadDataCompleted+=newDownloadDataCompletedEventHandler(wc_DownloadDataCompleted); ////开始异步下载，图片URL路径请根据实际情况自己去指定 ////同时将DataGridView当前行的行号传递过去，用于指定图片显示的CELL wc.DownloadDataAsync(newUri(this.dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString()), e.RowIndex); } } voidwc_DownloadDataCompleted(objectsender,DownloadDataCompletedEventArgse) { ////如果下载过程未发生错误，并且未被中途取消 if(e.Error==null&&!e.Cancelled) { ////将图片显示于对应的指定单元格，e.UserState就是传入的e.RowIndex ////e.Result就是下载结果 this.dataGridView1.Rows[(int)e.UserState].Cells["src"].Value=e.Result; //this.dataGridView1.Rows[(int)e.UserState].Cells["test"].Value=GetImage("1"); } }

winform 中显示异步下载的图片

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