Hi
I am creating online quiz in asp.net c#. For that i have one form that displays testlist in dropdownlist & start button. After clicking 2nd form appears, 2nd form shows one label for question, radiobuttonlist for answers ,next & checkbox for review. I am creating array of random question ids in start button click event of the 1stform. when i click next button in 2nd form then next random question appears, i want array of questions those are checked for review. I used code for arrays of values ( eg.10101) 1 for true & 0 for false as follows but i want array of that question ids those are checked:
int[] a = (int[])Session["values"];//this is array of random question ids created in 1st form
int g;
if (chkmark.Checked == true)
{
g = 1;
}
else
{
g = 0;
}
int[] chkarray = new int[Convert.ToInt32(Session["Counter"]) - 1];
int[] temp1 = (int[])Session["arrofchk"];
int k, no;
if (temp1 == null)
no = 0;
else
no = temp.Length;
for (k = 0; k < no; k++)
{
chkarray[k] = temp1[k];
}
chkarray[j] = g;
Personally, i would use a Dictionary<int, bool> for this.
In the key of the dictionary, you can store the random Question ID, in the value of the pair, you can store the checked item state. It might take you more work now to refactor it, but I believe it will save you a lot of time in the end when you want to do more actions on your quiz items.
Using a dictionary - or at least a well chosen collection, I think it will be easier to get the right data back.
For your example, it can work only if the positions of both arrays are the same.
Dictionary<int, bool> quizAnswers = new Dictionary<int, bool>(); // <questionID, checked>
// Fill dictionary with questions and answers
for(int i=0;i<a.length;i++)
{
if(temp1.length > i) // Make sure we don't get an IndexOutOfBoundsException
{
quizAnswers.Add(a[i], temp1[i] == 1);
}
}
// Get Answered question in array ( LINQ )
int[] checkedAnswers = (from KeyValuePair<int, bool> pair in quizAnswers
where pair.Value == true
select pair.Key).ToArray<int>();
The reason I am using a Dictionary here, is because I personally think it's neater than having two separate arrays.
I believe you should implement a Dictionary in your quiz, in stead of those arrays. What if the array indexes don't match, or you want to dynamically add a question to a fixed size array, etc..
It's something to take into consideration. Hope I could help you out.
Related
Im new to Java and JavaFX and Im trying to check it there is a duplicate in a Tableview, and if that is the case I would like to replace it with a new set of data.
So in essence I'm trying to iterate through the data in my TableView and compare it to something. To be more exact I'd like to compre a value of the String on the first column to a new String. I've done some research and I've found that the most common kind of solution for Filtering Data is using a FilteredList but this doesn't return my original set of items.
my current Code looks like this:
#FXML private TableView<STable> TableV;
public void Replace(String s){
ObservableList<STable> getCurrentData;
for(int i = 0; i < getCurrentData.size(); i++){
// Here is where I get Stuck I've tried:
//TableV.getSelectionModel().getSelectedItem().getCajas();
//getCurrentData.get(i)
}
}
Note: The STable is a class that has all the setters and getters for each of the columns, I've also got the CellFactory set up.
Any guidance on how to do this would be great!
Basically you just have to iterate through your data items, and compare the value representing the content of column 1, to your new string. If both values are equal, you update the value in your dataModel:
(I replaced STable with YourData, because I find the name for a dataModel a little confusing)
for (YourData data : tableView.getItems()) {
if (data.getColumOne().equals(textToCompare)) {
data.setColumnOne("newText");
}
}
Or if you want to replace the row:
for (int idx = 0; idx < tableView.getItems().size(); idx++) {
YourData data = tableView.getItems().get(idx);
if (data.getColumnOne().equals(textToCompare)) {
tableView.getItems().set(idx, someOtherData);
return;
}
}
This pertains to .NET Web Performance Tests.
If I have an ASP.NET page with a GridView that has a column of ints, how do I write an extraction rule to get the largest int in the column?
I tried creating a custom extraction rule by inheriting from ExtractionRule and in the Extract method using e.Response.HtmlDocument.GetFilteredHtmlTags however, the HtmlTags returned don't seem to expose their innerHtml contents.
Perhaps you can write an extraction rule that gets the whole column, then process the numbers to get their maximum value. Alternatively, use a built-in extraction rule to get the whole column, then write a plugin to get the maximum value. In either case your code should expect a mixture of numbers and other text.
Ben Day has a great blog post containing two types that express similar concerns. TableColumnValueValidator and ExtractRandomValueFromTable.
http://www.benday.com/2013/08/19/validation-extraction-rules-for-visual-studio-2012-web-performance-tests/
In the Extract(object, ExtractionEventArgs), you need to parse the ExtractionEventArgs.Response.BodyString. Ben uses the HtmlAgilityPack library for this. http://www.nuget.org/packages/htmlagilitypack
Something like this is roughly the code you'd need. This is simliar logic to ExtractRandomValueFromTable.
This does not account for thead/tbody or cells that span multiple columns/rows.
HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(e.Response.BodyString);
HtmlNode table = doc.GetElementbyId(TableId); // TableId is a test property
HtmlNodeCollection columns = table.SelectNodes("//th");
int columnIndex = FindColumnIndexByName(columns, ColumnName); // ColumnName is a test property
HtmlNodeCollection rows = table.SelectNodes("//tr")
int maxValue = Int32.MinValue;
foreach(HtmlNode row in rows)
{
HtmlNodeCollection cells = row.SelectNodes("./td");
// Todo check for bounds of cells here
HtmlNode cell = cells[columnIndex];
int value = Int32.MinValue;
Int32.TryParse(cell.InnerText.Trim(), out value);
maxValue = Math.Max(value, maxValue);
}
e.WebTest.Context.Add(ContextParameterName, maxValue);
int FindColumnIndexByName(HtmlNodeCollection columns, string columnName)
{
for(int i=0; i<columns.Count; i++)
if (String.Equals(columns[i].InnerText, columnName, StringComparison.OrdinalIgnoreCase))
{
return i;
}
return -1;
}
Have landed into a scenario.
I have a gridview with 22 static columns (few are BoundFields, few are TemplateFields).
We have a scenario in our project that we need to order the GridView according to the columns selected. The order of the columns selected is provided from the UI.
For ex: We have Doc1 to Doc23 as the columns.
Now, from the functionality provided in the UI, I am passing some 4 columns say Doc2,Doc4,Doc5,Doc7.
Now I want that only these 4 columns should be present in my grid as a final output.
Have tried some code, but it doesn't seem to work.
Below is my code:
public int GridColumnOrdering(string columnList)
{
string[] test = columnList.Split(';');
var docCatColumn = gridResultSet.Columns[0];
var docTypeColumn = gridResultSet.Columns[1];
int columnCount = 0;
int testCount = 0;
for (int i = 0; i < test.Count(); i++)
{
if (test[i] == "Doc2")
{
gridResultSet.Columns.Insert(i , docCatColumn);
columnCount++;
}
if (test[i] == "Doc3")
{
gridResultSet.Columns.Insert(i , docTypeColumn);
columnCount++;
}
}
gridResultSet.Columns[2].Visible = false;
gridResultSet.Columns[3].Visible = false;
}
columnList is a parameter passed which has values such as Doc2;Doc3.
My idea is that I get the static columns which resemble the column gotten from the UI, change its position to the very next position, and then hide that static column. In this way, we actually have 2 columns by the same name, but I am trying to hide the static one and display the dynamic one.
I know it sounds weird and hectic, but this is what came to my mind.
Now the problem is that if I try to change the visibility of the static column, the visibility of the dynamic one also changes.
Can experts help on this issue or point out to some easy method in this regards??
Regards
Anurag
We want to set the selection on a XtraGrid based on a List collection from the same type as the datamember of an XtraGrid.
The way we do it now is to iterate the gridview rows.
private void SetSelectedRowsInternal(IList<StrongType> collecshung)
{
grdvSomeGrid.ClearSelection();
grdvSomeGrid.BeginSelection();
for (int i = 0;i < grdvSomeGrid.RowCount;i++)
{
StrongType _strongTyped = ((StrongType)grdvSomeGrid.GetRow(i));
if (collecshung.Where(x => x.Id == _strongTyped.Id).Count() == 1)
grdvSomeGrid.SelectRow(i);
}
grdvSomeGrid.EndSelection();
}
Is there a better way to do this?
It depends on how you fill your grid ... You can directly iterate on the BindingList for instance (using LINQ). But if you find that it is taking more time than needed, then it should be because LINQ functions can be hit more than 1 million time even for a small amount of data.
I recommend you to use a dictionary instead of a LINQed collection.
I want to know that,
If we have LIST object created at server side which contains large amount of data entries like employess master data(10,000), & I want to give search option to search valid employee ID or name.
So I have tried to compare that entered text with that list of large entries in loop, which is obvious degrading performance.
So is there any option to better performace?
Thanks in advance.
Try this:
public List<Employee> SearchEmployee(string search, int pageNo, int pageLength)
{
MasterDataContext db = new MasterDataContext();
var searchResult = (from e in db.Employess
where (search == null ||
e.Name.ToLower().Contains(search.ToLower()))
select e).ToList();
int pageStart = (pageNo - 1) * pageLength;
var pageResult = from c in searchResult.Skip(pageStart).Take(pageLength)
orderby c.CardNo
select c;
return pageResult;
}
I hope it helps.