hi ASP.NET: Which strategy is better for populating a gridview? filling a Data Table and bind it or using a data reader ? Which one has a better performance? ...
I have a DataTable with column Value and column Name that has 30000 rows. Now i would like to get very fast Name from row that Value has specified. How to do this fast? I have like 40000 requests with various Values to this table. I'm interested in solution in C# and not on the database side. ...
I have a csv reader class that reads a .csv file and its values.... I have created datatable out of it... Consider my Datatable contains three header columns Name,EmailId,PhoneNo.... The values have been added successfully.... Now i want to add two columns IsDeleted,CreatedDate to this datatable... I have tried this but it doesn't seem t...
Hi, I am returning a .NET datatable to Flex Actionscript via a web service. Once I have the datatable then I want to grab the column names. The following code outputs my column names: for each (var tcolumn:Object in datatable.Columns){ trace('Column:'+tcolumn); } This works ok, but the column names are somehow encoded, so a colum...
I have a datatable with a column MobileNo.... My datatable has 150 rows and each row has MobileNo... Now how to check every MobileNo is unique by parsing all the datarows of the datatable in c#? EDIT: "This datatable is being created by reading a CSV file" ...
I have a DataTable with a DateTime column, "DateCol", that can be DBNull. The DataTable has one row in it with a NULL value in this column. I am trying to query rows that have either DBNull value in this column or a date that is greater than today's date. Today's date is 5/11/2010. I built a query to select the rows I want, but it di...
Currently I have a sql call returning a dataset from a MSSQL database and I want to take a column from that data and return ID's based off that column from the ORACLE database. I can do this one at a time but that requires multiple calls, I am wondering if this can be done with one call. String sql=String.Format(@"Select DIST_NO FRO...
I have some JSF code that currently works (as shown below), and I need to modify it to conditionally suppress the display of certain rows of the table. I know how to conditionally suppress the display of a particular cell, but that seems to create an empty cell, while what I'm trying to do is to not display the row at all. Any suggesti...
Considering the code below: Dataview someView = new DataView(sometable) someView.RowFilter = someFilter; if(someView.count > 0) { …. } Quite a number of articles which say Datatable.Select() is better than using DataViews, but these are prior to VS2008. Solved: The Mystery of DataView's Poor Performance with Large Recordsets Array...
I'm trying to see if there is a way to stop VS.NET 2008 from doing something which is very annoying to me and our particular standards of coding. When you create a blank dataset and then drag over from the server a table (or tables), VS.NET automatically creates a table adapter for that table, puts the connection information into the X...
Sending a DataTable's content in an html email, what is the preferred way to generate HTML from a DataTable? ...
Now I use Select and use a criteria which select only new rows. But is there any kind of GetInsertedRows-method. If I remember correctly there is status for each row so naturally one can loop through them all but that's not elegant. -Cheers -Matti ...
Hi all. I have 2 comboboxes on a form (form1) called combobox1 and combobox2. Each comboboxes should be filled with data stored in 2 different tables in Sql server 2005: table1 and table2 I mean: combobox1 --> table1 combobox2 --> table2 I fill data table with proper data and then bind the comboboxes to it separately. My pr...
I have a data table that is initially empty and is populated after a particular Javascript call. After the data is inserted into the table, I'd like to center all of the data in one of the columns. I tried specifying this at the initialization step in this way: dTable = $('#dt').datatable({ 'aoColumns': [ null, null, { "sClass" : "cente...
Hmmmm ... Although it works in most cases, one column has html data in it. It seems that doing this ... StringBuilder xmltarget = new StringBuilder(); XmlWriter xmlWriter = XmlWriter.Create(xmltarget); tableData.WriteXml(xmlWriter); ... doesn't identify where this html or binary data exists and wrap the data in cdata tags as...
Here's what I'm doing: I have (2) DataGridView controls DGV #1 is bound to the DataSet, DGV #2 is bound to a DataView of the SAME DataSet Now, what I'm needing to accomplish here is this: When a user checks a boolean column on the original DGV, the second DGV should now display the newly checked row also. The context is that the fir...
I have an asp.net website that will generate some excel files with 7-8 sheets of data. The best solution so far seems to be NPOI, this can create excel files without installing excel on the server, and has a nice API simillar to the excel interop. However i can't find a way to dump an entire datatable in excel similar to CopyFromRecords...
I have got a situation where I have list of records say 10,000, I am using datatable and I am using paging,(10 records per display). I wanted to put put that list in the session as: facesContext........put("mylist", mylist); And in the getters of the mylist, I have public List<MyClass> getMyList() { if(mylist== null){ my...
I have multiple datasets that I would like to combine into one. There is a common ID field that can be associated to each row. Calling Merge on the dataset will add additional rows to the dataset, but I would like to combine the additional columns. There are too many fields to do this in one query and therefore would make it unmanagea...
Hi i would like to know how to create custom values for the dataTable. For example I want to do some calculations for the values that will be placed in the dataTable. But what happens is that I get an error: ERROR errors.GrailsExceptionResolver - Executing action [dataTableJSON] of controller [com.MeetingController] caused exception: ...