C import Xls data method summary III (processing data in datatable)

C# Import .xls Data method summary III （ Handle DataTable Data in ）

// above , take Excel All the data in the table is written in dtExcel in
// The next step is before adding to the database , Processing of data in each column of the table
// Traverse dtExcel Every row of data in , According to the college name filled in 、 Grade name 、 The specialty name matches the corresponding ID

Create a new studentVo object , Used for storing processed i The data of
Get the uploaded file line data , Match by getting the field information of the header
Compare the obtained uploaded file line data with 【 Last one 】 Write a value equal to the result of the query database related table, and assign it to the declared studentVo Objects are stored first
If the imported data does not arrive again, the database does not have this data , It will return a prompt indicating where the uploader has a problem

for (int i = 0; i < dtExcel.Rows.Count; i++)
{
    
     DataRow row = dtExcel.Rows[i];

     // establish studentVo object , Save the data of each student traversed 
     studentVo studentVo = new studentVo();

     // Query the college according to its name ID
     string academeName = row[" college "].ToString().Trim();
     try
     {
    
          studentVo.AcademeID = dbAcademe.Single(m => m.AcademeName == academeName).AcademeID;
     }
     catch (Exception e)
     {
    
         returnJson.Text = string.Format(" The first {0} Of a student   college   Information matching error , Please check ", i + 1);
     	return Json(returnJson, JsonRequestBehavior.AllowGet);
     }

     // Query the major according to the major name ID
     string specialtyName = row[" major "].ToString().Trim();
     try
     {
    
         studentVo.SpecialtyID = dbSpecialty.Single(m => m.AcademeID == studentVo.AcademeID 
         && m.SpecialtyName == specialtyName).SpecialtyID;
     }
     catch (Exception e)
     {
    
          returnJson.Text = string.Format(" The first {0} Of a student   major   Information matching error , Please check ", i + 1);
          return Json(returnJson, JsonRequestBehavior.AllowGet);
     }

     // Query major according to grade name ID
     string gradeName = row[" grade "].ToString().Trim();
     try
     {
    
           studentVo.GradeID = dbGrade.Single(m => m.AcademeID == studentVo.AcademeID 
           && m.GradeName == gradeName).GradeID;
     }
     catch (Exception e)
     {
    
           returnJson.Text = string.Format(" The first {0} Of a student   grade   Information matching error , Please check ", i + 1);
           return Json(returnJson, JsonRequestBehavior.AllowGet);
     }

     // Query the major according to the class name ID
     string className = row[" class "].ToString().Trim();
     try
     {
    
         studentVo.ClassID = dbClass.Single(m => m.AcademeID == studentVo.AcademeID 
         && m.SpecialtyID == studentVo.SpecialtyID && m.GradeID == studentVo.GradeID 
         && m.ClassName == className).ClassID;
     }
     catch (Exception e)
     {
    
         returnJson.Text = string.Format(" The first {0} Of a student   class   Information matching error , Please check ", i + 1);
         return Json(returnJson, JsonRequestBehavior.AllowGet);
     }

      // Authentication ID No 
      if (!IdCardHelper.CheckIdCard(row[" ID number "].ToString().Trim()))
      {
    
           returnJson.Text = string.Format(" The first {0} The ID card information of students is wrong , Please check ", i + 1);
           return Json(returnJson, JsonRequestBehavior.AllowGet);
      }

      // Student ID , full name , ID number & Gender information filling object student
      studentVo.StudentNumber = row[" Student number "].ToString().Trim();
      studentVo.StudentName = row[" full name "].ToString().Trim();
      studentVo.StudentIDNum = row[" ID number "].ToString().Trim();
      studentVo.StudentSex = row[" Gender "].ToString().Trim();
      studentVo.UniformAuthenticationCode = row[" Unified authentication code "].ToString().Trim();

      // Add each piece of student information to studentVo Object list 
      listStudentVo.Add(studentVo);
}