我正在开发一个项目,在该项目中,我从excel文件中读取多个字段并将其保存在db.How中,以便在用户输入错误值时在页面上显示多个错误消息。 Aspose.cells用于读取数据。我的代码是
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;
}
.
.
.
显示消息方法仅显示单个错误消息。
答案 0 :(得分:0)
您可以创建一个空字符串列表,然后每次遇到错误时只需将其添加到列表中即可。然后,一旦列出了所有错误,就可以执行此操作:
string allErrors = string.Empty;
foreach (string err in errorList)
{
allErrors += err + "<br />";
}
if (allErrors != string.Empty)
{
ShowMessage(allErrors);
}