Am trying to convert the List returned by the DataBaseHandler to an Array.I get an error
final DatabaseHandler db = new DatabaseHandler(MainCourseList.this);
List<coursedb> contacts = db.getAllContacts(); //getting all records from database as a List
Collections.sort(elements);
images=pics.toArray(new String[pics.size()]);
String[] itemArray = new String[contacts.size()]; //converting the LIst to array
titles= contacts.toArray(itemArray);
descriptions = elements.toArray(new String[elements.size()]);
rowItemps = new ArrayList<CourseItem>();
for (int i = 0; i < descriptions.length; i++)
{
CourseItem item = new CourseItem(descriptions[i],images[i],titles[i]);// using the array values to add to listView
rowItemps.add(item);
}
listView = (ListView) findViewById(R.id.clist);
adapter = new CourseAdapter(this, rowItemps);
listView.setAdapter(adapter);
Related
i have to read rows of data from an excel file which has only a column and then i have to save the rows in a table in database .
In my project i have to use ClosedXML .dll .
I have search but i couldn't find an example .
Can you please help me?
Thanks
For the ClosedXML part, you can refer to the documentation at https://github.com/ClosedXML/ClosedXML/wiki/Finding-and-extracting-the-data
private static void Main()
{
List<String> categories;
List<String> companies;
ExtractCategoriesCompanies("NorthwindData.xlsx", out categories, out companies);
// Do something with the categories and companies
}
private static void ExtractCategoriesCompanies(string northwinddataXlsx, out List<string> categories, out List<string> companies)
{
categories = new List<string>();
const int coCategoryId = 1;
const int coCategoryName = 2;
var wb = new XLWorkbook(northwinddataXlsx);
var ws = wb.Worksheet("Data");
// Look for the first row used
var firstRowUsed = ws.FirstRowUsed();
// Narrow down the row so that it only includes the used part
var categoryRow = firstRowUsed.RowUsed();
// Move to the next row (it now has the titles)
categoryRow = categoryRow.RowBelow();
// Get all categories
while (!categoryRow.Cell(coCategoryId).IsEmpty())
{
String categoryName = categoryRow.Cell(coCategoryName).GetString();
categories.Add(categoryName);
categoryRow = categoryRow.RowBelow();
}
// There are many ways to get the company table.
// Here we're using a straightforward method.
// Another way would be to find the first row in the company table
// by looping while row.IsEmpty()
// First possible address of the company table:
var firstPossibleAddress = ws.Row(categoryRow.RowNumber()).FirstCell().Address;
// Last possible address of the company table:
var lastPossibleAddress = ws.LastCellUsed().Address;
// Get a range with the remainder of the worksheet data (the range used)
var companyRange = ws.Range(firstPossibleAddress, lastPossibleAddress).RangeUsed();
// Treat the range as a table (to be able to use the column names)
var companyTable = companyRange.AsTable();
// Get the list of company names
companies = companyTable.DataRange.Rows()
.Select(companyRow => companyRow.Field("Company Name").GetString())
.ToList();
}
EDIT: The below only gets you a populated datatable. You'll then need to load that datatable into your database. You don't say which database this is, but for SQL Server you would use the SqlBulkCopy class (see definition, which also has an example).
Late to the party, but try this:
public static DataTable GetDataTableFromExcel(string path, string sheetname = "", bool hasHeader = true)
{
using (var workbook = new XLWorkbook(path))
{
IXLWorksheet worksheet;
if (string.IsNullOrEmpty(sheetname))
worksheet = workbook.Worksheets.First();
else
worksheet = workbook.Worksheets.FirstOrDefault(x => x.Name == sheetname);
var rangeRowFirst = worksheet.FirstRowUsed().RowNumber();
var rangeRowLast = worksheet.LastRowUsed().RowNumber();
var rangeColFirst = worksheet.FirstColumnUsed().ColumnNumber();
var rangeColLast = worksheet.LastColumnUsed().ColumnNumber();
DataTable tbl = new DataTable();
for (int col = rangeColFirst; col <= rangeColLast; col++)
tbl.Columns.Add(hasHeader ? worksheet.FirstRowUsed().Cell(col).Value.ToString() : $"Column {col}");
Logger("started creating datatable");
rangeRowFirst = rangeRowFirst + (hasHeader ? 1 : 0);
var colCount = rangeColLast - rangeColFirst;
for (int rowNum = rangeRowFirst; rowNum <= rangeRowLast; rowNum++)
{
List<string> colValues = new List<string>();
for (int col = 1; col <= colCount; col++)
{
colValues.Add(worksheet.Row(rowNum).Cell(col).Value.ToString());
}
tbl.Rows.Add(colValues.ToArray());
}
Logger("finished creating datatable");
return tbl;
}
}
and call like this:
var datatable = GetDataTableFromExcel(fileName, sheetName);
If you're using (the excellent and free in its basic form) LinqPad, you can inspect the datatable using datatable.Dump();
I am using dtSearch on combination with a SQL database and would like to maintain a table that includes all DocIds and their related FileNames. From there, I will add a column with my foreign key to allow me to combine text and database searches.
I have code to simply return all the records in the index and add them one by one to the DB. This, however, takes FOREVER, and doesn't address the issue of how to simply append new records as they are added to the index. But just in case it helps:
MyDatabaseContext db = new StateScapeEntities();
IndexJob ij = new dtSearch.Engine.IndexJob();
ij.IndexPath = #"d:\myindex";
IndexInfo indexInfo = dtSearch.Engine.IndexJob.GetIndexInfo(#"d:\myindex");
bool jobDone = ij.Execute();
SearchResults sr = new SearchResults();
uint n = indexInfo.DocCount;
for (int i = 1; i <= n; i++)
{
sr.AddDoc(ij.IndexPath, i, null);
}
for (int i = 1; i <= n; i++)
{
sr.GetNthDoc(i - 1);
//IndexDocument is defined elsewhere
IndexDocument id = new IndexDocument();
id.DocId = sr.CurrentItem.DocId;
id.FilePath = sr.CurrentItem.Filename;
if (id.FilePath != null)
{
db.IndexDocuments.Add(id);
db.SaveChanges();
}
}
To keep the DocId in the index you must use the flag dtsIndexKeepExistingDocIds in the IndexJob
You can also look the dtSearch Text Retrieval Engine Programmer's Reference when the DocID is changed
When a document is added to an index, it is assigned a DocId, and DocIds are always numbered sequentially.
When a document is reindexed, the old DocId is cancelled and a new DocId is assigned.
When an index is compressed, all DocIds in the index are renumbered to remove the cancelled DocIds unless the dtsIndexKeepExistingDocIds flag is set in IndexJob.
When an index is merged into another index, DocIds in the target index are never changed. The documents merged into the target index will all be assigned new, sequentially-numbered DocIds, unless (a) the dtsIndexKeepExistingDocIds flag is set in IndexJob and (b) the indexes have non-overlapping ranges of doc ids.
To improve your speed you can search for the word "xfirstword" and get all documents in an index.
You can also look to the faq How to retrieve all documents in an index
So, I used part of user2172986's response, but combined it with some additional code to get the solution to my question. I did indeed have to set the dtsKeepExistingDocIds flag in my index update routine.
From there, I only wanted to add the newly created DocIds to my SQL database. For that, I used the following code:
string indexPath = #"d:\myindex";
using (IndexJob ij = new dtSearch.Engine.IndexJob())
{
//make sure the updated index doesn't change DocIds
ij.IndexingFlags = IndexingFlags.dtsIndexKeepExistingDocIds;
ij.IndexPath = indexPath;
ij.ActionAdd = true;
ij.FoldersToIndex.Add( indexPath + "<+>");
ij.IncludeFilters.Add( "*");
bool jobDone = ij.Execute();
}
//create a DataTable to hold results
DataTable newIndexDoc = MakeTempIndexDocTable(); //this is a custom method not included in this example; just creates a DataTable with the appropriate columns
//connect to the DB;
MyDataBase db = new MyDataBase(); //again, custom code not included - link to EntityFramework entity
//get the last DocId in the DB?
int lastDbDocId = db.IndexDocuments.OrderByDescending(i => i.DocId).FirstOrDefault().DocId;
//get the last DocId in the Index
IndexInfo indexInfo = dtSearch.Engine.IndexJob.GetIndexInfo(indexPath);
uint latestIndexDocId = indexInfo.LastDocId;
//create a searchFilter
dtSearch.Engine.SearchFilter sf = new SearchFilter();
int indexId = sf.AddIndex(indexPath);
//only select new records (from one greater than the last DocId in the DB to the last DocId in the index itself
sf.SelectItems(indexId, lastDbDocId + 1, int.Parse(latestIndexDocId.ToString()), true);
using (SearchJob sj = new dtSearch.Engine.SearchJob())
{
sj.SetFilter(sf);
//return every document in the specified range (using xfirstword)
sj.Request = "xfirstword";
// Specify the path to the index to search here
sj.IndexesToSearch.Add(indexPath);
//additional flags and limits redacted for clarity
sj.Execute();
// Store the error message in the status
//redacted for clarity
SearchResults results = sj.Results;
int startIdx = 0;
int endIdx = results.Count;
if (startIdx==endIdx)
return;
for (int i = startIdx; i < endIdx; i++)
{
results.GetNthDoc(i);
IndexDocument id = new IndexDocument();
id.DocId = results.CurrentItem.DocId;
id.FileName= results.CurrentItem.Filename;
if (id.FileName!= null)
{
DataRow row = newIndexDoc.NewRow();
row["DocId"] = id.DocId;
row["FileName"] = id.FileName;
newIndexDoc.Rows.Add(row);
}
}
newIndexDoc.AcceptChanges();
//SqlBulkCopy
using (SqlConnection connection =
new SqlConnection(db.Database.Connection.ConnectionString))
{
connection.Open();
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.DestinationTableName =
"dbo.IndexDocument";
try
{
// Write from the source to the destination.
bulkCopy.WriteToServer(newIndexDoc);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
newIndexDoc.Clear();
db.UpdateIndexDocument();
}
Here is my new solution with AddDoc method from the SearchResults interface:
First get the StartingDocID and the LastDocID from the IndexInfo and walk the loop like this:
function GetFilename(paDocID: Integer): String;
var
lCOMSearchResults: ISearchResults;
lSearchResults_Count: Integer;
begin
if Assigned(prCOMServer) then
begin
lCOMSearchResults := prCOMServer.NewSearchResults as ISearchResults;
lCOMSearchResults.AddDoc(GetIndexPath(prIndexContent), paDocID, 0);
lSearchResults_Count := lCOMSearchResults.Count;
if lSearchResults_Count = 1 then
begin
lCOMSearchResults.GetNthDoc(0);
Result := lCOMSearchResults.DocDetailItem['_Filename'];
end;
end;
end
I am trying to add array in an array i.e 2d array, while I am trying it throws this error:
List index out of bound 0
I am trying at this line:
df_depts_obs[df_mk_index] = departmentobs_columns;
private void initializeInconsistentRecommendations() {
recmn_qty = new List<Integer>();
String mk_unique_Data;
Integer bookmark;
bookmark=0;
mk_unique_Data='';
totalCount = 0;
inconsistentRecommendations = new List<AA_Recommendations__c>();
inconsistentAccessorys = new List<AA_Accessory__c>();
df_depts = new List<AA_DepartmentObservation__c>();
df_depts_obs = new List<List<AA_DepartmentObservation__c>>();
df_depts_recmds = new List<List<AA_DepartmentRecommendation__c>>();
df_depts_prds = new List<List<AA_Recommendations__c>>();
String df_mk_unique_dept='';
Integer df_mk_index=-1;
departmentRecommendations_data = new List<AA_DepartmentRecommendation__c>();
List<AA_DepartmentObservation__c>departmentObservations = [SELECT Id, Name, Observation_ID__c,Department_ID__r.Name,Observation_ID__r.Observation__c FROM AA_DepartmentObservation__c
WHERE Department_ID__r.Assessment__c = :assessment.Id LIMIT 10];
if (departmentObservations.size() > 0) {
for (integer index = 0; index < departmentObservations.size(); index++ ) {
AA_DepartmentObservation__c departmentObservation = departmentObservations[index];
//df_depts.add(departmentObservation); // FOR DEPARTMNET HEADING
if(!df_mk_unique_dept.contains((String)departmentObservations[index].Department_ID__r.Name)){
df_mk_unique_dept += '<li>'+departmentObservations[index].Department_ID__r.Name+'</li>';
df_depts.add(departmentObservation); // FOR DEPARTMNET HEADING
df_mk_index = df_mk_index + 1;
}
List<AA_DepartmentObservation__c> departmentobs_columns = new List<AA_DepartmentObservation__c>();
departmentobs_columns.add(departmentObservation);
df_depts_obs[df_mk_index] = departmentobs_columns;
In Apex, you cannot use array notation [ ] to add objects, only set values for indexes in the array already exists.
You can either declare the size of the array so that it is initialized, or grow the array dynamically using the add method.
This example shows both options:
List<List<String>> stringList = new List<List<String>>(1);
List<String> innerListOne = new List<String> {'Red','Blue'};
List<String> innerListTwo = new List<String> {'One','Two'};
stringList[0] = innerListOne;
stringList.add(innerListTwo);
I have a datagridview (DGV) which contains some columns and a generic list which contains the focus information for all those columns available in the DGV. Now when I enter e cell in DGV, I want to get it's focus information from the list in a string variable. I am receiving the DGVs currentCell and fieldName (DGVs column name for which I want to load focus info) as input parameters. Below is my code:
private Rectangle GetFocusSettingsForField(string fieldName, DataGridViewCell currentCell)
{
NA27Bo bo = new NA27Bo();
Rectangle rectangle = new Rectangle();
string projectId = dgvEntryVerify["ProjectId", currentCell.RowIndex].Value.ToString();
string batchId = dgvEntryVerify["BatchId", currentCell.RowIndex].Value.ToString();
string imageId = dgvEntryVerify["ImageId", currentCell.RowIndex].Value.ToString();
string noOnImage = dgvEntryVerify["NumberOnImage", currentCell.RowIndex].Value.ToString();
int serialNo = Convert.ToInt32(dgvEntryVerify["SerialNumber", currentCell.RowIndex].Value.ToString());
PropertyInfo[] properties = bo.GetType().GetProperties();
string actualFieldName = "";
for (int i = 0; i < properties.Length; i++)
{
if (properties[i].Name.Contains(fieldName + "Focus"))
{
actualFieldName = properties[i].Name;
}
}
// Here I want to get the data from property "actualFieldName" of the list
//string value = data from property "actualFieldName" of the list
}
I am using VS2012, C#, Winforms but Framework 2.0 (framework can't be changed).
got this error Items collection must be empty before using ItemsSource.
this error is found in this line:
BuildstreamComboBox.ItemsSource = dz;
the code:
public void PopulatebuildstreamFromXMLFile()
{
if (BuildmachineComboBox.SelectedIndex == 0)
{
ds3.Clear();
ds3.ReadXml(#"C:\GUI\buildermanageremail.xml");
DataView dy = ds3.Tables["buildstream4"].DefaultView;
BuildstreamComboBox.ItemsSource = dy; //Sets the collection of items from which to populate
BuildstreamComboBox.DisplayMemberPath = "value"; //Sets the path within an item to use for display
}
if (BuildmachineComboBox.SelectedIndex == 1)
{
ds3.Clear();
ds3.ReadXml(#"C:\GUI\buildermanageremail.xml");
DataView dz = ds3.Tables["buildstream5"].DefaultView;
BuildstreamComboBox.ItemsSource = dz; //Sets the collection of items from which to populate
BuildstreamComboBox.DisplayMemberPath = "value"; //Sets the path within an item to use for display
}
}
where ds3 is definded:
DataSet ds3 = new DataSet();
anybody has any idea?
Your question itself contains your answer, you need to clear the items collection prior of assigning it a new items source lke this - BuildstreamComboBox.Items.Clear()