I have values in datasource and there is no problem with datasource. I have to assign X and Y values to the chart. Chart throws an error and says there is no column with named "TotalInboundArrivals".
ChartControl chart = new ChartControl();
chart.Location = new Point(38, 301);
chart.Size = new Size(789, 168);
Series series = new Series("Series1", ViewType.Bar);
chart.Series.Add(series);
series.DataSource = ds;
series.ArgumentScaleType = ScaleType.Numerical;
series.ArgumentDataMember = "TotalInboundArrivals"; //throws error here
series.ValueScaleType = ScaleType.Numerical;
series.ValueDataMembers.AddRange(new string[] { "StartTime" }); //throws error here
((SideBySideBarSeriesView)series.View).ColorEach = true;
((XYDiagram)chart.Diagram).AxisY.Visible = true;
chart.Legend.Visible = true;
chart.Visible = true;
chart.Dock = DockStyle.Fill;
xtraTabPage1.Controls.Add(chart);
Where is my Problem? Any Suggestions?
Have you went through Series.DataSource Property. You are making the mistake of assigning DataSet as DataSource to series. Think about it, how could it search columns in Data Source. Try to assign Ds.Tables["TableName"] as the datasource.
Creating DataSource Table
private DataTable CreateChartData(int rowCount) {
// Create an empty table.
DataTable table = new DataTable("Table1");
// Add two columns to the table.
table.Columns.Add("Argument", typeof(Int32));
table.Columns.Add("Value", typeof(Int32));
// Add data rows to the table.
Random rnd = new Random();
DataRow row = null;
for (int i = 0; i < rowCount; i++) {
row = table.NewRow();
row["Argument"] = i;
row["Value"] = rnd.Next(100);
table.Rows.Add(row);
}
Specifying Series properties corresponding to datasource
Series series = new Series("Series1", ViewType.Bar);
chart.Series.Add(series);
// Generate a data table and bind the series to it.
series.DataSource = CreateChartData(50);
// Specify data members to bind the series.
series.ArgumentScaleType = ScaleType.Numerical;
series.ArgumentDataMember = "Argument";
series.ValueScaleType = ScaleType.Numerical;
series.ValueDataMembers.AddRange(new string[] { "Value" });
Check the Examples and go through the Creating Charts -> Providing Data section to better understand it.
Reference
Hope this helps.
Related
I am populating a dataGridView from an incomplete excel spreadsheet and generating the LiteDB from the dataGridView. Before the recent update, I wasn't having any issues. Now I am getting the error 'Objects cannot be cast from DBNull to other types'. I can work around this by including dummy values in the original spreadsheet. But ultimately we need to see what information we're missing. How can I accomplish this?
public void CreateDatabase()
{
using (var db = new LiteDatabase(#"C:\Users\BThatcher\Documents\_Personal\Revit\MDL-Sheets\SheetDatabase04.db")) //< ----------------
{
var sheets = db.GetCollection<Sheet>("sheets");
foreach (DataGridViewRow row in dataGridView2.Rows)
{
var sheet = new Sheet
{
SheetSequence = Convert.ToInt32(row.Cells[0].Value),
SheetNumber = row.Cells[1].Value.ToString(),
SheetName = row.Cells[2].Value.ToString(),
AreaNumber = Convert.ToInt32(row.Cells[3].Value),
AreaName = row.Cells[4].Value.ToString(),
SheetDiscipline = row.Cells[5].Value.ToString(),
DisciplineSort = Convert.ToInt32(row.Cells[6].Value),
SheetSort = Convert.ToInt32(row.Cells[7].Value),
ModelName = row.Cells[8].Value.ToString(),
AppearsInSheetlist = row.Cells[9].Value.ToString(),
DesignedBy = row.Cells[10].Value.ToString(),
DrawnBy = row.Cells[11].Value.ToString(),
CheckedBy = row.Cells[12].Value.ToString(),
ApprovedBy = row.Cells[13].Value.ToString(),
SheetTotal = Convert.ToInt32(row.Cells[14].Value),
DesignSoftware = row.Cells[15].Value.ToString(),
HasPdf = row.Cells[16].Value.ToString(),
PdfPath = row.Cells[17].Value.ToString(),
};
sheets.Insert(sheet);
this.Close();
}
}
}
This error are not from LiteDB (there is no DBNull in LiteDB). It's possible this DBNull are getting from row.Cells[n].Value when you try to convert.
LiteDB support nulls and nullable values (like int?).
I'm fairly new to javafx, so please bear with me if my question is unclear. I've a TableView which need to be populated using an ObservableList.
The code below populates my "data" with the arraylists generated out of the Map, which in turn is used to add rows to my table.
TableView<ArrayList> table = new TableView<>();
ObservableList<ArrayList> data = FXCollections.observableArrayList();
for(int i=0;i<listSelectedVerticesIds.size();i++){
ArrayList<String> tempString = new ArrayList<>();
for(Map.Entry<String,String> temp2 : mapVertex.get(listSelectedVerticesIds.get(i)).entrySet()){
tempString.add(temp2.getValue());
}
data.add(tempString);
}
table.setItems(data);
However, I do not see the table populated with the list in "data". I'm guessing this is because there is no data binding (using setCellValueFactory). However, as you can see I dont have a data model class. All of my data comes from the Map as strings which I would like to populate in my tableview.
Please suggest.
Here is a simple way to do it that works great. You don't need a data structure to populate a table. You only see that because that's what most examples show. It is an extremely common use case to populate a table from a database or a file. I don't understand why this is so hard to find examples for. Well, hope this helps.
private TableView<ObservableList<StringProperty>> table = new TableView<>();
private ArrayList<String> myList = new ArrayList<>();
private void updateTableRow() {
for (int row = 0; row < numberOfRows; row++) {
ObservableList<StringProperty> data = FXCollections.observableArrayList();
for (int column = 0; column < numberOfColumns; column++) {
data.add(column, new SimpleStringProperty(myList.get(row + (column * numberOfRows))));
}
table.getItems().add(data);
}
}
I have retrieved data from database and i am able to show it in Table of the Table Viewer but my task is on click of a row the data should be appear in another form from where i can edit it and on click of update the view should be updated with the new values.I am using viewer.addSelectionChangedListener to retrieve the selected row but i am not getting how to update the table .Please suggest me few ideas
I have written the below code in the constructor of my class so whenever object is created Table is generated and l1 is list of data which i am passing to another UI
input[i] = new MyModel(persons[i].getDateOfRegistration(), persons[i].getFirstName(),
persons[i].getMiddleName(), persons[i].getLastName(), persons[i].getGender(),
persons[i].getDob(), persons[i].getContactNumber(), persons[i].getMaritalStatus(),
persons[i].getAddress(), persons[i].getCountry(), persons[i].getBloodGroup(),
persons[i].getInsuranceDetails().getPolicyHolderName(),
persons[i].getInsuranceDetails().getPolicyNumber(),
persons[i].getInsuranceDetails().getSubscriberName(),
persons[i].getInsuranceDetails().getRelationshipToPatient());
viewer.setInput(input);
table.setHeaderVisible(true);
table.setLinesVisible(true);
GridData gridData = new GridData();
gridData.verticalAlignment = GridData.FILL;
gridData.horizontalSpan = 2;
gridData.grabExcessHorizontalSpace = true;
gridData.grabExcessVerticalSpace = true;
gridData.horizontalAlignment = GridData.FILL;
viewer.getControl().setLayoutData(gridData);
viewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
IStructuredSelection selection = (IStructuredSelection) event.getSelection();
StringBuffer sb = new StringBuffer("Selection - ");
int j = 0;
String[] s;
for (Iterator iterator = selection.iterator(); iterator.hasNext();) {
sb.append(iterator.next() + ", ");
System.out.println("Testing::" + sb);
}
System.out.println(sb);
String result[] = new String[18];
List l1 = new ArrayList(100);
String[] parts = sb.toString().split("=");
for (int i = 0; i < parts.length; i++) {
System.out.println("s" + parts[i]);
String[] s1 = parts[i].split(",");
l1.add(s1[0]);
}
SWTPatientRegistrationUpdatePageEventView swtPatientRegistrationUpdatePageEventView = new SWTPatientRegistrationUpdatePageEventView();
swtPatientRegistrationUpdatePageEventView.openParentUpdateShell(l1);
// viewer.refresh();
//flag=false;
//refreshingData(list);
}
});
Make sure we will follow table viewer MVC architecture all the time. Steps we can do to resolve your issue isas follow:
Create proper datastructure(Model Class) to hold the data. and use the same in array which you set in viewer.setInput()
When you click/double click on table row, fetch the data and save it in datastructure created(with new object).
Pass that data structure to your form dialog.
when you are done with update in form. Fill the updated data in new Model object again.
And after form close, pass that model object back to parent.
updated the corresponding array element with object received from Form Dialog and just refresh the tableviewer.
Please let me know if you need some code module. Thanks
I wrote the code to update my table (SecurityQuestionAnswer) with new security password questions and move to old questions to another table (SecurityQuestionAnswersArchives). Total no of security questions is 3. I am able to update the current table, but when I add the same rows to history table, it shows weird data: only two records are added instead of 3 and the data is also duplicated. My code is as follows:
if (oldQuestions.Any())
{
var oldquestionstoarchivelist = new List<SecurityQuestionAnswersArchives>();
var oldquestionstoarchive =new SecurityQuestionAnswersArchives();
for (int i = 0; i < 3; i++)
{
oldquestionstoarchive.Id = oldQuestions[i].Id;
oldquestionstoarchive.SecurityQuestionId = oldQuestions[i].SecurityQuestionId;
oldquestionstoarchive.Answer = oldQuestions[i].Answer;
oldquestionstoarchive.UpdateDate = oldQuestions[i].UpdateDate;
oldquestionstoarchive.IpAddress = oldQuestions[i].IpAddress;
oldquestionstoarchive.SecurityQuestion = oldQuestions[i].SecurityQuestion;
oldquestionstoarchive.User = oldQuestions[i].User;
oldquestionstoarchivelist.Add(oldquestionstoarchive);
}
user.SecurityQuestionAnswersArchives = oldquestionstoarchivelist;
//await Store.UpdateAsync(user);
_dbContext.ArchiveSecurityQuestionAnswers.AddRange(oldquestionstoarchivelist);
_dbContext.SecurityQuestionAnswers.RemoveRange(oldQuestions);
await _dbContext.SaveChangesAsync();
oldquestionstoarchivelist.Clear();
}
UPDATE 1
The loop looks fine, It iterates three times(0,1,2), which is expected. First issue is with AddRange function to which I was passing a list , but it takes an IEnumerable input, I rectified it using following code.
IEnumerable<SecurityQuestionAnswersArchives> finalArchiveses = oldquestionstoarchivelist;
_dbContext.ArchiveSecurityQuestionAnswers.AddRange(finalArchiveses);
The other issue is duplicate data , which I am unable to figure out where the issue is. Please help me in finding this out.
Your help is much appreciated !
Got it ! Just sharing in case anybody has same issue.
The problem was with initialization at wrong place. I moved
var oldquestionstoarchive =new SecurityQuestionAnswersArchives();
in side the Forloop, now the variable will hold the unique values over each iteration.
var oldquestionstoarchivelist = new List<SecurityQuestionAnswersArchives>();
for (int i = 0; i < 3; i++)
{
var oldquestionstoarchive = new SecurityQuestionAnswersArchives();
oldquestionstoarchive.SecurityQuestionId = oldQuestions[i].SecurityQuestionId;
oldquestionstoarchive.Answer = oldQuestions[i].Answer;
oldquestionstoarchive.UpdateDate = oldQuestions[i].UpdateDate;
oldquestionstoarchive.IpAddress = oldQuestions[i].IpAddress;
oldquestionstoarchive.SecurityQuestion = oldQuestions[i].SecurityQuestion;
oldquestionstoarchive.User = oldQuestions[i].User;
oldquestionstoarchivelist.Add(oldquestionstoarchive);
}
i'm not good with ADO.NET
so used the following code that i got from Internet
but i get the error "There is no row at position 0." # the marked line(*)
even though i can see a value is being passed using breakpoints
DataSet ds = new DataSet();
DataTable dt = new DataTable("ProdFromDGV");
ds.Tables.Add(dt);
foreach (DataGridViewColumn col in dataGridView1.Columns)
{
dt.Columns.Add(col.HeaderText, typeof(string));
}
foreach (DataGridViewRow row in dataGridView1.Rows)
{
foreach (DataGridViewCell cell in row.Cells)
{
*dt.Rows[row.Index][cell.ColumnIndex] = cell.Value.ToString();*
}
}
dt.WriteXml("table.xml");
You need to first create a DataRow type and add it into your DataTable before you can start assigning to it.
So your code will now be something like:
DataSet ds = new DataSet();
DataTable dt = new DataTable("ProdFromDGV");
ds.Tables.Add(dt);
foreach (DataGridViewColumn col in dataGridView1.Columns)
{
dt.Columns.Add(col.HeaderText, typeof(string));
}
foreach (DataGridViewRow row in dataGridView1.Rows)
{
foreach (DataGridViewCell cell in row.Cells)
{
// This will not work, but it's something similar to this that you need here...
DataRow row = new DataRow();
dt.RowCollecion.Add(row);
// Now you can assign to the row....
dt.Rows[row.Index][cell.ColumnIndex] = cell.Value.ToString();
}
}
dt.WriteXml("table.xml");
Hope this helps some..
// This will not work, but it's something similar to this that you need here...
Just change
DataRow row = new DataRow();
to:
DataRow row = dt.NewRow();
and it will work.