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C import Xls data method summary V (complete code)
2022-07-04 01:11:00 【Xiao Zhong wants to learn!!!】
C# Import .xls Data method summary V （ Complete code ）
explain ：
This code is only for my personal review and release for easy viewing
I won't elaborate on the last save below , Because back to the metropolis , No, I won't even speak
The saving of uploaded data is mainly related to the database fields you set , It's OK to see whether the data matches
public ActionResult ImportExcel(HttpPostedFileBase excelFile)
{
ReturnJson returnJson = new ReturnJson();
int saveCount = 0;
// Idea of batch import data
// 1、 Get the read file -> Determine if the data type is correct ;
// 2、 Convert files to binary arrays ;
// 3、 Convert binary array into memory stream ;
// 4、 utilize NPOI Read the data in the memory stream into Excel
try
{
// Get file suffix
string fileExtension = Path.GetExtension(excelFile.FileName);
// Judge whether the document is excel form
if (".xls".Equals(fileExtension.ToLower()) || ".xlsx".Equals(fileExtension.ToLower()))
{
// Declare the binary array to store the file
byte[] fileBytes = new byte[excelFile.ContentLength];
// Convert the file into binary data group and store it in fileBytes
excelFile.InputStream.Read(fileBytes, 0, excelFile.ContentLength);
// Convert binary array into memory stream
MemoryStream excelFileStream = new MemoryStream(fileBytes);
// Convert memory stream to workbooks
IWorkbook workbook = new HSSFWorkbook(excelFileStream);
// Determine if there are worksheets in the workbook
if (workbook.NumberOfSheets > 0)
{
// Query out college , major , grade , class Information about ： It is used to get the corresponding ID
List<SYS_Academe> dbAcademe = myModel.SYS_Academe.ToList();
List<SYS_Specialty> dbSpecialty = myModel.SYS_Specialty.ToList();
List<SYS_Grade> dbGrade = myModel.SYS_Grade.ToList();
List<SYS_Class> dbClass = myModel.SYS_Class.ToList();
// establish studentVo The object list -》 Used to store imported students / User data
List<studentVo> listStudentVo = new List<studentVo>();
// Get the first sheet
ISheet sheet = workbook.GetSheetAt(0);
// Determine whether there is data in the worksheet
//PhysicalNumberOfRows Number of physical rows obtained , Not including those empty lines （ Interlace ） The situation of
if (sheet.PhysicalNumberOfRows > 0)
{
#region take Excel Table data into DataTable in
// Load data into datatable in
// Definition datatable
DataTable dtExcel = new DataTable();
// Gets the second row in the worksheet （ The first line is the description , The index for 0）
IRow rowHeader = sheet.GetRow(1);
/* FirstCellNum： Gets the subscript of the first cell in a row LastCellNum： Get the number of columns in a row FirstRowNum： Get the subscript of the first actual row LastRowNum： Get the subscript of the last actual line */
// Get the number of table columns
int cellCount = rowHeader.LastCellNum;
// Get the number of table rows
int rowCount = sheet.LastRowNum + 1;
// Cycle through the values of each cell in the header row -- It is equivalent to defining the fields of the database table
for (var i = rowHeader.FirstCellNum; i < cellCount; i++)
{
// establish dataTable Column in
// By traversing each cell in the row , Get the data of each cell in the header row
DataColumn dtColumn = new DataColumn(rowHeader.GetCell(i).StringCellValue);
// Put the data of the obtained Title row into datatable in ;
dtExcel.Columns.Add(dtColumn);
}
// obtain Excel Data rows in the table
//(sheet.FirstRowNum) The first line is the description ; The second line is the title ; The third line starts with the data information
for (var j = sheet.FirstRowNum + 2; j < rowCount; j++)
{
// Get data row （3,4,5,6,......） data
IRow row = sheet.GetRow(j);
// establish DataTable That's ok
DataRow dtRow = dtExcel.NewRow();
if (row != null)
{
// De blank line variable
bool isNull = true;
// Traverse all cells in a row , fill dtRow in
for (var n = row.FirstCellNum; n < cellCount; n++)
{
if (row.GetCell(n) != null)
{
string cellVal = row.GetCell(n).ToString();
dtRow[n] = cellVal;
// Go to the airport , If there are non empty cells in the row , Variable isNull by false, Otherwise true
if (!string.IsNullOrEmpty(cellVal))
{
isNull = false;
}
}
}
if (!isNull)
{
// take b Non empty data row dtRow fill dtExcel in
dtExcel.Rows.Add(dtRow);
}
}
}
#endregion
#region 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
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);
}
#endregion
#region To repeat
#region Compare between imported data , To judge whether or not to repeat
// Place data in myListStudentVo China and listStudentVo Compare the data in
List<studentVo> myListStudentVo = new List<studentVo>();
// Judge whether there are duplicates in the information imported into students
for (int i = 0; i < listStudentVo.Count; i++)
{
if (i != 0)
{
for (int j = 0; j < myListStudentVo.Count; j++)
{
if (listStudentVo[i].StudentIDNum.Trim() == myListStudentVo[j].StudentIDNum.Trim() ||
listStudentVo[i].StudentNumber.Trim() == myListStudentVo[j].StudentNumber.Trim() ||
listStudentVo[i].UniformAuthenticationCode.Trim() == myListStudentVo[j].UniformAuthenticationCode.Trim())
{
returnJson.Text = string.Format("Excel Page in the table {0} Duplicate data with other data ,<br> Please check the ID number. 、 Student number and unified authentication code ！", i + 1);
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
myListStudentVo.Add(listStudentVo[i]);
}
else
{
// The first data is directly put into myListStudentVo in
myListStudentVo.Add(listStudentVo[0]);
}
}
#endregion
#region Comparison of imported data with database , To judge whether or not to repeat
// Query student table & Data from user tables
List<PW_Student> dbListStudent = myModel.PW_Student.ToList();
List<PW_User> dbListUser = myModel.PW_User.ToList();
// Judge whether the imported data is duplicate with the data in the database
// Traverse imported data
for (int n = 0; n < listStudentVo.Count; n++)
{
// Traverse database student data
for (int m = 0; m < dbListStudent.Count; m++)
{
if (listStudentVo[n].StudentIDNum == dbListStudent[m].StudentIDNum ||
listStudentVo[n].StudentNumber == dbListStudent[m].StudentNumber)
{
returnJson.Text = string.Format("Excel Page in the table {0} Duplicate student data and database data ,<br> Please check the ID card number and student ID number. ！", n + 1);
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
// Traverse database user data
for (int k = 0; k < dbListUser.Count; k++)
{
if (listStudentVo[n].UniformAuthenticationCode == dbListUser[k].UniformAuthenticationCode)
{
returnJson.Text = string.Format("Excel Page in the table {0} Student authentication codes already exist , Please check ！", n + 1);
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
}
#endregion
#endregion
#region preservation
// Adding multiple pieces of data , Open transaction , Only when all data is successfully added can the transaction be committed , Otherwise, roll back
// Ensure data integrity
using (TransactionScope scope = new TransactionScope())
{
// Data table addition order ： User table => Student list => Role schedule
// Traverse listStudentVo list
foreach (studentVo student in listStudentVo)
{
// Create a user table object
PW_User dbUser = new PW_User();
dbUser.UniformAuthenticationCode = student.UniformAuthenticationCode;
dbUser.UserNuber = student.StudentNumber;
dbUser.Password = Common.AESEncryptHelper.Encrypt(student.StudentNumber);
dbUser.ToVoidNo = true;
// newly added , preservation
myModel.PW_User.Add(dbUser);
if (myModel.SaveChanges() > 0)
{
// Get users ID
var userId = dbUser.UserID;
// Create a student table object
PW_Student dbStudent = new PW_Student();
dbStudent.UserID = userId;
dbStudent.ClassID = student.ClassID;
dbStudent.GradeID = student.GradeID;
dbStudent.SpecialtyID = student.SpecialtyID;
dbStudent.AcademeID = student.AcademeID;
dbStudent.StudentName = student.StudentName;
dbStudent.StudentSex = student.StudentSex;
dbStudent.StudentIDNum = student.StudentIDNum;
dbStudent.StudentNumber = student.StudentNumber;
dbStudent.StudentState = " This year's session ";
// Save new
myModel.PW_Student.Add(dbStudent);
if (myModel.SaveChanges() > 0)
{
// Create user role schedule objects
PW_UserRoleDetail dbUserRoleDetail = new PW_UserRoleDetail();
dbUserRoleDetail.UserID = userId;
dbUserRoleDetail.UserTypeID = 6;//1- Super administrator ;4- Teachers' ;6- Student ;7- College Counselor
// newly added , preservation
myModel.PW_UserRoleDetail.Add(dbUserRoleDetail);
if (myModel.SaveChanges() > 0)
{
saveCount++;
}
else
{
returnJson.Text = " Failed to add user role , Please check ！";
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
else
{
returnJson.Text = " Student addition failed , Please check ！";
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
else
{
returnJson.Text = " Failed to add user , Please check ！";
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
}
// Judge saveCount Is the value of listStudentVo Number of data
if (saveCount == listStudentVo.Count)
{
// Commit transaction
scope.Complete();
// Successful import
returnJson.State = true;
returnJson.Text = " Successful import ！";
}
else
{
returnJson.Text = " Import failed , Please check ！";
}
}
#endregion
}
else {
returnJson.Text = " The worksheet is empty , Please check ！";
}
}
else {
returnJson.Text = " There are no worksheets in the workbook , Please check ！";
}
}
else {
returnJson.Text = " Wrong file type Uploaded , Please check ！";
}
}
catch (Exception e)
{
Console.WriteLine(e);
returnJson.Text = " Data exception ："+e;
}
return Json(returnJson, JsonRequestBehavior.AllowGet);
}
There are many ways to import data , This is just one of them , When the data is repeated, the data will not be imported , It is also a major drawback .
Another import is , The non duplicate data is still saved into your database , If it is repeated, it will reply uniformly again. Where do you have data duplication , Therefore, there is no one size fits all for non duplicate data
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