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我正在一個項目中,我從一個excel文件中讀取多個字段並將它們保存在db中。如果用戶輸入錯誤的值,如何在頁面上顯示多個錯誤消息。 Aspose.cells用於讀取數據。我的代碼是如何在不驗證的情況下在頁面上顯示錯誤摘要?
public List<Data> ImportFromExcel(Stream bytes, out bool isFine)
{
isFine = true;
DateTime DOJ;
List<Data> list = new List<Data>();
DataTable dt = new DataTable();
Workbook workBook = new Workbook();
workBook.Open(bytes);
Worksheet workSheet = workBook.Worksheets[0];
try
{
dt = workSheet.Cells.ExportDataTable(0, 0, workSheet.Cells.MaxRow + 1, workSheet.Cells.MaxColumn + 1, true);
}
catch (Exception ex)
{
isFine = false;
ShowMessage("Your file has some invalid formats of data. Please review it and try again.", MessageType.Error, true);
return null;
}
try
{
int i = 1;
foreach (DataRow reader in dt.Rows)
{
if (reader["LetterId"].ToString().Length > 75)
{
isFine = false;
ShowMessage("In Row Number " + i + " Letter Id cannot exceed 75 characters.", MessageType.Error, true);
return null;
}
if (reader["Subject"].ToString().Length > 75)
{
isFine = false;
ShowMessage("In Row Number " + i + " Subject cannot exceed 75 characters.", MessageType.Error, true);
return null;
}
.
.
.
顯示消息方法只顯示單個錯誤消息。
建議:調用'ShowMessage'前'變量在'列表添加你的錯誤消息。最後,結合錯誤消息('string.Join')並調用'ShowMessage' –
mshsayem