修改了下载错误后的显示；增加了退出时的默认值；更改了后缀名设置

Author: nishilv2

Printer/Printer/Form1.cs

@@ -448,6 +448,7 @@ private void login_download_FormClosing(object sender, FormClosingEventArgs e)
             //注意判断关闭事件Reason来源于窗体按钮，否则用菜单退出时无法退出!
             if (e.CloseReason == CloseReason.UserClosing)
             {
+                ensure_notifyIcon.Checked = true;
                 exit_panel.Show();
                 e.Cancel = true;
                 //this.WindowState = FormWindowState.Minimized;    //使关闭时窗口向右下角缩小的效果

Printer/Printer/ToJsonMy.cs

@@ -50,9 +50,20 @@ public string filename
             {
                 string fileName = id + "_" + copies + "_" + double_side + "_" + student_number + "_" + name;
                 string doc_extension = Path.GetExtension(fileName);
-                if (doc_extension != ".pdf")
+                //if (doc_extension != ".pdf")
+                //{
+                //    fileName = fileName + ".pdf";
+                //}
+                switch (doc_extension)
                 {
-                    fileName = fileName + ".pdf";
+                    case ".doc":
+                    case ".docx":
+                    case ".ppt":
+                    case ".pptx":
+                        fileName = fileName + ".pdf";
+                        break;
+                    default:
+                        break;
                 }
                 return fileName;
             }

Printer/Printer/download_class.cs

@@ -93,6 +93,7 @@ void webClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
                 if (!database.jsonlist_err.Contains(file))
                 {
                     database.jsonlist_err.Add(file);
+                    display.display_single(form, this.file);
                 }
 
             }
@@ -130,7 +131,7 @@ private void OnDownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
             if (e.Error == null)//下载成功
             {
                 MessageBox.Show("已下载完成\n请再次点击打印按钮");
-                form.mydata.Rows[RowIndex].Cells["operation"].Value = "通知打印完成";
+                form.mydata.Rows[RowIndex].Cells["operation"].Value = "确认打印完成";
             }
             else
             {
@@ -386,7 +387,7 @@ override public void webClient_DownloadFileCompleted(object sender, AsyncComplet
                 form.notifyIcon1.Visible = true;
                 form.notifyIcon1.ShowBalloonTip(10000);
                 form.mydata.Rows[RowIndex].Cells["status"].Value = "已下载";
-                form.mydata.Rows[RowIndex].Cells["operation"].Value = "通知打印完成";
+                form.mydata.Rows[RowIndex].Cells["operation"].Value = "确认打印完成";
 
                 if (database.jsonlist_err.Contains(file))
                 {