I want to copy all the record of position object to position archive object whenever a position is deleted but it is not inserting anything in position archive object. Here is my code-
trigger ArchivePosition on Position__c (after delete)
{
List<Position_Archive__c> arch = new List<Position_Archive__c>();
List<Position__c> pos = new List<Position__c>();
for(Position__c temp:trigger.old)
{
Position_Archive__c obj = new Position_Archive__c();
obj.Name=temp.Name;
arch.add(obj);
System.debug(obj.Name);
}
try
{
insert arch;
System.debug(arch);
}
catch(Exception e){
System.debug('Exception '+e.getMessage());
}
}
Related
I have package in SSIS that loads data using adomd.Net from essbase cube. With 2 columns package works fine, but when I add 3. column package fails.
Error message says:
Object reference not set to an instance of an object.
Third column in the first row contains null and some values in other rows.
Problem looks in null value in the 3. column.
I tried this if statement but I get empty column instead of values.
AdomdDataReader reader = null;
try
{
using (AdomdConnection conn = new AdomdConnection(connectionString))
{
conn.Open();
using (AdomdCommand cmd = new AdomdCommand(query, conn))
{
reader = cmd.ExecuteReader();
while (reader.Read())
{
Output0Buffer.AddRow();
Output0Buffer.Column = (reader.GetString(0));
Output0Buffer.Column1 = (reader.GetString(1));
if (!reader.IsDBNull(2))
{
Output0Buffer.Column2 = "test";
}
else
{
Output0Buffer.Column2 = (reader.GetString(2));
}
Console.WriteLine("fin");
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
throw;
}
This bit of the code is working the opposite way as intended:
if (!reader.IsDBNull(2))
{
Output0Buffer.Column2 = "test";
}
else
{
Output0Buffer.Column2 = (reader.GetString(2));
}
!reader.IsDBNull(2) means where the value is not null. Removing the exclamation point will fix the problem
I am trying to have my asp.net WebAPI web service read a .csv and update a database using Entity Framework. The .csv file is about 20,000-30,000 rows.
As of now I am using a TextfieldParser to read the .csv, each row of the .csv file I create a new object, then add object to the EF context.
Once it's done adding all rows to the context, then I call db.SaveChanges();
Watching the console I noticed it calls an update statement for each row... which takes a long time. Is there a better more efficient way to accomplish this?
if (filetype == "xxx")
{
using (TextFieldParser csvReader = new TextFieldParser(downloadFolder + fileName))
{
csvReader.SetDelimiters(new string[] { "," });
csvReader.HasFieldsEnclosedInQuotes = true;
int rowCount = 1;
while (!csvReader.EndOfData)
{
string[] fieldData = csvReader.ReadFields();
//skip header row
if (rowCount != 1)
{
var t = new GMI_adatpos
{
PACCT = fieldData[3]
};
db.GMI_adatpos.Add(t);
}
rowCount++;
}
}
}
db.SaveChanges();
This issue is very common,
In your case, we can split it into two category:
Add vs AddRange Performance
Write & database round-trip
Add vs AddRange Performance
The Add method will try to detect change every time you add a new record while the AddRange only does it once. Detecting changes every time can take several minutes.
This issue is very easy to fix, simply create a list, add the entity to this list instead and use AddRange with the list at the end.
List<GMI_adatpo> list = new List<GMI_adatpo>();
if (filetype == "xxx")
{
using (TextFieldParser csvReader = new TextFieldParser(downloadFolder + fileName))
{
csvReader.SetDelimiters(new string[] { "," });
csvReader.HasFieldsEnclosedInQuotes = true;
int rowCount = 1;
while (!csvReader.EndOfData)
{
string[] fieldData = csvReader.ReadFields();
//skip header row
if (rowCount != 1)
{
var t = new GMI_adatpos
{
PACCT = fieldData[3]
};
list.Add(t);
}
rowCount++;
}
}
}
db.GMI_adatpos.AddRange(list)
db.SaveChanges();
Write & Database round-trip
Everytime you save a record, you perform a database round-trip. So if you insert average 30,000 record, you perform 30,000 database round-trip which is insane!
Disclaimer: I'm the owner of the project Entity Framework Extensions
This library allows to perform:
BulkSaveChanges
BulkInsert
BulkUpdate
BulkDelete
BulkMerge
You can either call BulkSaveChanges instead of SaveChanges or create a list to insert and use directly BulkInsert instead for even more performance.
BulkSaveChanges Solution (Way faster than SaveChanges)
db.GMI_adatpos.AddRange(list)
db.SaveChanges();
BulkInsert Solution (Fastest than BulkSaveChanges but do not save related entities)
db.BulkInsert(list);
Because the number of items added to the DbContext is very high, ram space is gradually filled, and operation is very slow. Therefore is better that after a few records (ex 100), calling SaveChanges Methods and renew DbContext.
if (filetype == "xxx")
{
using (TextFieldParser csvReader = new TextFieldParser(downloadFolder + fileName))
{
csvReader.SetDelimiters(new string[] { "," });
csvReader.HasFieldsEnclosedInQuotes = true;
int rowCount = 1;
while (!csvReader.EndOfData)
{
if(rowCount%100 == 0)
{
db.Dispose();
db.SaveChanges();
db = new AppDbContext();//Your DbContext
}
string[] fieldData = csvReader.ReadFields();
//skip header row
if (rowCount != 1)
{
var t = new GMI_adatpos
{
PACCT = fieldData[3]
};
db.GMI_adatpos.Add(t);
}
rowCount++;
}
}
}
I am looking for some solution where i want to pass 100s of records to the form where i am having more than 50 fields. I did some research for the testNG data providers but it looks like that it returns only strings so i feel that it will not be feasible to go with data providers as if its not good to pass 50 string arguments to specific function. Also i did some research to read excel file and i get two ways that either i can go with the jxl or Apache poi but with that also i am not able to read the data by the column header as if i can not go with the row and column number of approach as i have so many fields that i need to work with. The reason behind that is that in future is one field has added to single form that its going to be rework and again its not feasible.
enter image description here
I have been following this link:
http://www.softwaretestinghelp.com/selenium-framework-design-selenium-tutorial-21/
for reading data column wise but any how i am not getting the records based on the column header. Do we have any other way to achieve this.
Thanks
"testNG data providers but it looks like that it returns only strings" - incorrect. It allows you to return a multidimensional array of type Object. What kind of object you create is your own code. You may choose to read from the excel, encapsulate all the fields in one object (your own pojo) or multiple objects and then the method argument can have just those object types declared and not the 50 strings.
Both jxl and poi are libraries to interact with excel. If you want to have specific interaction with excel, like reading based on header, then you need to write code for that - it doesn't come out of the box.
If you are concerned about addition of one more column , then build your indices first by reading the header column, then put it in a relevant data structure and then go about reading your data.
I finally achieved that with the help of apache poi. I created on centralized function that is returning the hashmap having title as an index.
Here is that function:
Here is my main test function:
#Test(dataProvider="dpCreateNewCust")
public void createNewCustomer(List<Map<String, String>> sheetList){
try{
//Step 2. Login
UtilityMethods.SignIn();
for(Map<String, String> map : sheetList){
//Step 3. New Customer
if(map.get("Testcase").equals("Yes"))
{
//Process with excel data
ProcessNewCustomer(map);
}
}
}
catch(InterruptedException e)
{
System.out.println ("Login Exception Raised: <br> The exception get caught" + e);
}
}
//My data provider
#DataProvider(name = "dpCreateNewCust")
public Object[][] dpCreateNewCust(){
XLSfilename = System.getProperty("user.dir")+"//src//watts//XLSFiles//testcust.xlsx";
List<Map<String, String>> arrayObject = UtilityMethods.getXLSData(XLSfilename,Sheetname));
return new Object[][] { {arrayObject } };
}
//----GetXLSData Method in UtilityMethods Class :
public static List<Map<String, String>> getXLSData(String filename, String sheetname)
{
List<String> titleList = new ArrayList<String>();
List<Map<String, String>> sheetList = new ArrayList<Map<String, String>>();
try {
FileInputStream file = new FileInputStream(filename);
//Get the workbook instance for XLS file
XSSFWorkbook XLSbook = new XSSFWorkbook(file);
//Get first sheet from the workbook
//HSSFSheet sheet = workbook.getSheetAt(0);
WorkSheet = XLSbook.getSheet(sheetname);
//Iterate through each rows from first sheet
int i = 0;
Iterator<Row> rowIterator = WorkSheet.iterator();
while(rowIterator.hasNext()) {
Row row = rowIterator.next();
//For each row, iterate through each columns
Iterator<Cell> cellIterator = row.cellIterator();
int j = 0;
Map<String, String> valueMap = new HashMap<>();
while(cellIterator.hasNext()) {
Cell cell = cellIterator.next();
if(i==0){
titleList.add(cell.getStringCellValue());
}
else
{
String cellval = "";
switch(cell.getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
cellval = cell.getBooleanCellValue()+"";
break;
case Cell.CELL_TYPE_NUMERIC:
cellval = String.valueOf(cell.getNumericCellValue())+"";
break;
case Cell.CELL_TYPE_STRING:
cellval = cell.getStringCellValue();
break;
default:
break;
}
if(cellval!="")
{
valueMap.put(titleList.get(j), cellval); valueMap.put("ResultRow",String.valueOf(row.getRowNum()));
valueMap.put("ResultCol",String.valueOf(0));
}
}
j++;
}
if(i!=0 && !valueMap.isEmpty()){
//System.out.println(valueMap);
sheetList.add(valueMap);
}
i++;
}
//System.out.println(sheetList); System.exit(0);
file.close();
XLSbook.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return sheetList;
}
I changed the name of one of my tables, then afterwards encoded some data then pulled it using a view to my surprise the data is not showing. I tried renaming it back to its original name with no luck the same thing is happening.
Then finally I tried retyping the data on one of the columns and then executed the view and there the data is finally showing now the problem arises I need to re encode the data on one of the column every time a data is inserted which is obviously not a good thing to do.
here is the code on how i added some data
tblcsv.Columns.AddRange(new DataColumn[7] { new DataColumn("unit_name", typeof(string)), new DataColumn("unit", typeof(string)), new DataColumn("adrress", typeof(string)), new DataColumn("latitude", typeof(string))
,new DataColumn("longitude" , typeof(string)) , new DataColumn("region" , typeof(string)) , new DataColumn("linkid" , typeof(string))});
string ReadCSV = File.ReadAllText(forex);
foreach (string csvRow in ReadCSV.Split('\n'))
{
if (!string.IsNullOrEmpty(csvRow))
{
//Adding each row into datatable
tblcsv.Rows.Add();
int count = 0;
foreach (string FileRec in csvRow.Split(','))
{
tblcsv.Rows[tblcsv.Rows.Count - 1][count] = FileRec;
if (count == 5)
{
tblcsv.Rows[tblcsv.Rows.Count - 1][6] = link;
}
count++;
}
}
}
string consString = ConfigurationManager.ConnectionStrings["diposlConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(consString))
{
using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con))
{
//Set the database table name
sqlBulkCopy.DestinationTableName = "dbo.FRIENDLY_FORCES";
//[OPTIONAL]: Map the Excel columns with that of the database table
sqlBulkCopy.ColumnMappings.Add("unit_name", "unit_name");
sqlBulkCopy.ColumnMappings.Add("unit", "unit");
sqlBulkCopy.ColumnMappings.Add("adrress", "adrress");
sqlBulkCopy.ColumnMappings.Add("latitude", "latitude");
sqlBulkCopy.ColumnMappings.Add("longitude", "longitude");
sqlBulkCopy.ColumnMappings.Add("region", "region");
sqlBulkCopy.ColumnMappings.Add("linkid", "linkid");
con.Open();
sqlBulkCopy.WriteToServer(tblcsv);
con.Close();
}
}
the column region is where i manually edited the data
Did the renaming of the table did something to my data?
Or am I just missing something?
Thank you
Suppose I have 3 entities generated from EF, say tab1, tab2 and tab3. In SL app, I call SubmitChanges to save data to DB, all changes will be process by WCF and EF automatically.
Question is: how can I know the order of Update operation in Database?
I need to know this because I have triggers on those tables and need to know the order of the updating.
One thing you can do is to override the PeristChangeSet() in your DomainService and manually control the order of saves. Just do nothing in your regular update/insert statements. Here's some pseudocode for a saving a document exmmple to explain my answer:
[Insert]
public void InsertDocument(MyDocument objDocument) { }
[Update]
public void UpdateDocument(MyDocument objDocument) { }
protected override bool PersistChangeSet()
{
try {
// have to save document first to get its id....
MyDocument objDocumentBeingSaved = null;
foreach (ChangeSetEntry CSE in ChangeSet.ChangeSetEntries.Where(i => i.Entity is MyDocument)) {
var changedEntity = (MyDocument)CSE.Entity;
objDocumentBeingSaved = documentRepository.SaveDocument(changedEntity);
break; // only one doc
}
if (objDocumentBeingSaved == null)
throw new NullReferenceException("CreateDocumentDomainService.PersistChangeSet(): Error saving document information. Document is null in entity set.");
// save document assignments after saving document object
foreach (ChangeSetEntry CSE in ChangeSet.ChangeSetEntries.Where(i => i.Entity is DocumentAssignment)) {
var changedEntity = (DocumentAssignment)CSE.Entity;
changedEntity.DocumentId = objDocumentBeingSaved.Id;
changedEntity.Id = documentRepository.SaveDocumentAssignment(objDocumentBeingSaved, changedEntity);
}
// save line items after saving document assignments
foreach (ChangeSetEntry CSE in ChangeSet.ChangeSetEntries.Where(i => i.Entity is LineItem)) {
var changedEntity = (LineItem)CSE.Entity;
changedEntity.DocumentId = objDocumentBeingSaved.Id;
changedEntity.Id = documentRepository.SaveLineItem(objDocumentBeingSaved, changedEntity);
}
documentRepository.GenerateDocumentNumber(objDocumentBeingSaved.Id);
}
catch {
// ....
throw;
}
return false;
}