private void btnQuery_Click(object sender, EventArgs e) { if (!CheckInput()) { return; } var RealName = textBox1.Text; var type = ""; if (cboChooseType.SelectedItem.ToString() == "实验表") { type = "experiment"; } if (cboChooseType.SelectedItem.ToString() == "课程表") { type = "course"; } RecvDataFromDBHelper recvDataFromDBHelper = new RecvDataFromDBHelper(); var pictures = recvDataFromDBHelper.ReveicePicture(RealName, type); if (pictures == null) { MessageBox.Show("未找到信息表!"); return; } if (pictures.Count == 1) { //将图片显示 var picture = pictures.First().Picture; if (picture == null) { MessageBox.Show("未找到信息表!"); return; } //将字节数组转换为图片并加以显示 MemoryStream ms = new MemoryStream(picture); Image image = Image.FromStream(ms); picTimeTable.Image = image; } }