revise event file export

CyberX8_MainPages/ViewModels/EventViewModel.cs

@@ -209,8 +209,8 @@ namespace CyberX8_MainPages.ViewModels
             try
             {
                 Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
-                dlg.DefaultExt = ".csv"; // Default file extension 
-                dlg.Filter = "Excel数据表格文件(*.csv)|*.csv"; // Filter files by extension 
+                dlg.DefaultExt = ".xls"; // Default file extension 
+                dlg.Filter = "Excel数据表格文件(*.xls)|*.xls"; // Filter files by extension 
                 Nullable<bool> result = dlg.ShowDialog();// Show open file dialog box
                 if (result == true) // Process open file dialog box results
                 {
@@ -218,7 +218,7 @@ namespace CyberX8_MainPages.ViewModels
                     ds.Tables.Add(new System.Data.DataTable("系统运行日志"));
                     ds.Tables[0].Columns.Add("类型");
                     ds.Tables[0].Columns.Add("时间");
-                    ds.Tables[0].Columns.Add("腔体");
+                    ds.Tables[0].Columns.Add("模块");
                     ds.Tables[0].Columns.Add("发起源");
                     ds.Tables[0].Columns.Add("内容描述");
                     foreach (var item in SearchedResult)
@@ -236,9 +236,9 @@ namespace CyberX8_MainPages.ViewModels
             }
             catch (Exception ex)
             {
-                //LOG.Write(ex);
                 LOG.WriteExeption(ex);
-                MessageBox.Show("导出系统日志发生错误", "导出失败", MessageBoxButton.OK, MessageBoxImage.Warning);
+                MessageBox.Show($"导出失败: {ex.Message}", "错误",
+                    MessageBoxButton.OK, MessageBoxImage.Error);
             }
         }