Should be easy but google couldn't give me a straight answer. I have an array. The fields in the array have underscores that I would like to remove e.g. "Column_1" to "Column 1". Does anyone know a good way to do this without looping through the whole array and rebuilding it anew? I didn't see any methods in the reference that would make this easy. thx
Depending on where you are using this Array, you could use the labelFunction to format the data before presenting it. It is present in Lists, DataGrids and Trees.
But you'd only need this if you have a very large data and wouldn't want to loop over all the records before showing them. A labelFunction would "reprocess" the label everytime before it's presented.
Flex 3 has built in refactoring
Edit... I may have misunderstood..
If you want to format the data in the array just loop through it and use regex to remove the underscores... or you can modify your query which grabs the data (if it is populated from a query)
Related
DataSet is said to be a collection of one or more DataTable objects.
Is it possible to use an array of DataTable objects?
If yes, then why use a DataSet? Are there any advantages?
Please help!
A DataSet has some extra properties rather than a simple Array of DataTable. For instance, it is serializable.
You should always stick to existing .NET classes rather than inventing new ones.
In an object oriented language, people preferred to use an object rather than an array. It's more intuitive for anyone reading your code if you use DataSet.Datatable(TheTableName). You can briefly describe what's inside of that table with the table name. By contrast, creating an array of tables is not a good idea. Take a look at this code: DataTableArray(0) = MyDataTable . The next time if you tried to find MyDataTable, it's not possible for anyone who's reading your code to remember that MyDataTable is restored in DataTableArray with an index of 0. This concept is also applied in the concept of LINQ.
Please take a look at this page. MSDN helps.
https://msdn.microsoft.com/zh-tw/library/bb397897.aspx
I am trying to find the index of an item in a classic asp array. i get how it's possible with looping, but is there something else i can use? indexOf() or something along those lines? i can't seem to find anything online
Is it an array of strings, or some other type of objects?
For standard data types you can use Array.BinarySearch(myArray, searchString), but you have to sort the array first.
I have a tbl_categories and a tbl_items. I want to display tbl_categories in a horizontal manner and list objects from tbl_items vertically below each category name. I am confused how to get all this data using TSQL stored procedures and displaying them using ASP.NET native controls.
Columns with headers of category names. rows of items keyed with category_id.
The db is set up correctly. It is the ASP.NET controls I have trouble with.
I would use a Repeater myself, and make it output an HTML Table. The categories row would be in the HeaderTemplate, the closing tags in the FooterTemplate, and the actual data inside the ItemTemplate
http://blogs.sitepoint.com/asp-net-repeater-control/
The best way to handle this is to setup business objects which support the data in a way you wish to present it, which may not always be the way it is handled by your database.
Then you can use those objects directly to bind or feed data into the UI.
You could use Pivot to do that. See this referece http://msdn.microsoft.com/en-us/library/ms177410.aspx
I have a problem with the AdvancedDataGrid widget. When the dataProvider is an ArrayCollection (of arrays), the nth array (within the collection) is also the nth row within the grid, and I can jump and display the i-th row by scripting
adg.selectedIndex = i;
adg.scrollToIndex(i);
now, when I add a Grouping, the dataProvider ends up being a GroupingCollection2, and now the index in the dataprovider's source does not correspond to the index in the adg anymore (which is understandable, because it's being grouped).
How can I select and display a row in grouped data efficiently? Currently, I have to traverse the adg and compare each found item with its data attributes in order to find the correct index of the row within the adg, and jump to it like above. This process is very slow. Any thoughts?
edited later:
We already used a caching object as Shaun suggests, but it still didn't compensate for the search times. In order to fully construct a sorting of a list of things (which this problem equates to, as the list is completely reordered by the grouping), you always have to know the entire set. In the end we didn't solve that problem. The project is over now. I will accept Shaun's answer if no one knows a better way in three days.
Depending on what values your comparing against you can store the objects in a dictionary with the lookup using the property/properties that would be searched for, this way you have a constant time look-up for the object (no need to look at every single item). Say for example your using a property called id on an object then you can create an AS object like
var idLookup:Object = {};
for(myObject in objects)
idLookup[myObject.id] = myObject;
//Say you want multiple properties
//idLookup[myObject.id]={};
//idLookup[myObject.id][myObject.otherProp] = myObject;
now say the user types in an id you go into the idLookup object at that id property and retrieve the object:
var myObject:Object = idLookup[userInput.text];
myAdg.expandItem(myObject, true);
now when you want to get an object by id you can just do
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/controls/AdvancedDataGrid.html#expandItem()
I haven't done any thorough testing of this directly, but use a similar concept for doing quick look-ups for advanced filtering. Let me know if this helps at all or is going in the wrong direction. Also if you could clarify a bit more in terms of what types/number of values you need to lookup and if there's the possibility for multiple matches etc. I may be able to provide a better answer.
Good luck,
Shaun
I have a relatively simple Listview that suddenly needs (due to new requirements) to have it's 'layout' extracted to a DataTable so that a common routine can convert it to an Excel spreadsheet for export purposes.
The ItemTemplate is just a series of Table Rows with some text, data-bound labels and textboxes with validators in the cells.
Usually, when trying to pull out a particular value (like what was entered into a text box), I use the ListViewItem's .FindControl method.
For Each objItem As ListViewItem In lvwOptions.Items
Dim objTextHrsLabor As TextBox = CType(objItem.FindControl("txtHrsOptByLabor"), TextBox)
decHours = CDec(objTextHrsLabor.Text)
Next
In this case, however, I'm trying to take all the data displayed - all the 'rows and columns' of the table that was created.
Inside the ForEach / Next loop of ListViewItems, I started a ForEach/Next loop of Controls for each instance's controls but I got some really strange results returned (like controls that had a couple of table cells in them).
I get the sense I'm headed in the wrong direction. All I want is for the nicely-formatted 5-line, 6 column table to be converted to a 5-line, 6-column data table.
Is there another avenue I should be looking at?
I would look at the underlying data source for your ListView.
The data source must be a collection or an IEnumerable and you should be able to iterate through it to build your data table.
If you know that all elements are of the same type then you can use the first element and look at its properties using reflection to determine which columns your table should contain. Then you can add DataRows to your table and fill in the columns using the property names.
This will probably be faster than iterating through the generated html of the ListView.
I used this approach for exporting a ListView to Excel: http://aspalliance.com/771_CodeSnip_Exporting_GridView_to_Excel.
I know it deals with a GridView, but I adapted it to a ListView (as long as the underlying structure is a table) and it worked fine for me.
HTH.
you can use..
listView1.Items[0].SubItems[0].Text
this will be helpful , really simple and easy . You can extract info right on the basis of index & use anyway you want.