dataset

VB.NET - Debugging and DataSets?

Anyway to view the content of a dataset or datatable in debug? I don't mean looking up a specific element of the dataset but to view the hole thing. ...

Powershell -- working with a null DataTable

Given this code: $connection = new-object system.data.sqlclient.sqlconnection( ` "Data Source=$server;Initial Catalog=$instance;Integrated Security=SSPI;"); $adapter = new-object system.data.sqlclient.sqldataadapter ($query, $connection) $set = new-object system.data.dataset $adapter.Fill($set) | out-null $table = new-object syst...

How edit dataset column value in asp.net

Hi i have dataset having one table have 5 columns fill data from database. When i run application datatable contains more than 50 rows, I would like to update value of datatable after getting data from databse. My requirements are This table have few cells having Null value, I would like to replace null with "-" ? One column is System...

Getting a stable dataset after update

Hi! I have a dataset which has modified, inserted and deleted rows. I send the dataset.GetChanges to my MiddleTier which in turn sends it to a server that updates the database. I use GetChanges so I send over as few rows as possible. The server updates, inserts and deletes rows just fine and sends back the updated dataset which I then...

accessing a System.Data.DataRow object in a multithreaded program

Hi, i am trying to extract a single row of data from a DataSet. Unfortunately since this program is multithreaded any changes made in a different thread to the DataSet are carried over to my separate DataRow object. I'm declaring the DataRow as below: Dim DR As System.Data.DataRow = DS.Tables(0).Rows(0) I SyncLock DS during the declar...

IS there a short way to insert dataset into a new MS Access table?

I'm consuming a 3rd-party web service that outputs a Dataset (from XML). I'd like to create a new table in my local MS Access database that contains the DataSet data. Is there a simple way to hand-off the DataSet to a .net object and ask it to "create a table from this"? I know that we can use different parts of ADO to extract schem...

using table in list data region for repeat data in rdlc

I use 2 table in a list data region for repeating data. I group data in list data region. My dataset that used in table have 3 data table. I can't use of all data tables as data provider for report. When I open Expression window and click on Datasets, all datasets shown to me but all of their fields use of an aggregate function like sum....

What should I know before moving from Datasets to Linq2Sql ?

Finally, I'm taking a decision to shift from conventional ado.net datasets to Linq2Sql. I'm not migrating my existing projects to Linq2Sql but I'll be using Linq2Sql in new projects from this point forward. I'm responsible for primary design of applications where I work so I look forward to have answers from you for things that I must b...

Problem with filling dataset

This is a small portion of my code file. Each time my debugger reaches the line 'NewDA.Fill(NewDS);' at runtime it jumps to the catch. I'm positive the daynumber variable gets a value that's present in the database and I've tried the query outside of the codefile on my database and it works fine. I'm also using the connectionstring 'db' ...

create Sql TransAction Method on Data.xsd

I've added to my project a dataset item called : myDataSet.xsd After this, I drop tables on myDataSet.xsd file. That's all okey. What I want to do is, to build Sql Transaction's as function on that dataset, how can I do this? ...

when adding a column more to a DB table, how do you get your datagridview to show the change?

I have created a dataset in a project in visual studio that points to a table in my database and then bound a datagridview control to it. Now I open the database and add another column to the table in the database. Then i open the dataset and update it's configuration to include the change. Then i want to update the datagridview, but I...

Dataset and SQLCe in .net 4

I'm trying to build a SQLCe table structure dynamically using a dataset as the temporary table structure... Is there a SqlConnection string that will work with SqlCe? There used to be a SqlCeConnection...but I don't find that in the 4.0 framework? Has something replaced this? If the answer is L2S or Entity Framework...can I add colum...

How to get DataSet.ReadXml to parse a DateTime attribute as a typed DateTime

I have an XML string which contains Dates formatted "dd/MM/yyyy hh:mm:ss". I'm loading this XML into a dataset using DataSet.ReadXml(). How can I ensure that this Date is stored in the DataSet as a typed DateTime so that I can Sort, Format and RowFilter on it accordingly. My test harness is as below: ASPX Page: <%@ Page Language="C#...

Implementing Advanced Filter Page

I have a page which gives user to generate report based on different filters selected. I need some suggestion or idea on my thoughts Loop through each filter control (checkbox, multi select list, radiobox list) and build dynamic where conditions and conjunctions for each filter and then run query Get all the data (i think this will c...

Does calling .WriteXml on an ADO.NET DataSet cause an implied .AcceptChanges()?

I have a small application that uses a dataset as a backingstore. I want to provide some amount of recoverability in the event of a program crash without having to constantly update and save my master file. If I were to call .WriteXml on my dataset to a "recovery" file, will that cause an implied "AcceptChanges" to be performed on my d...

SQL query debugging required

i am working in winforms with C#. heres my code query = "SELECT max(Appointment_Time) FROM Appointments WHERE (Appointment_Status = 'D')"; dset = db.GetRecords(query,"Appointments"); ctime_Label.Text = dset.Tables["Appointments"].Rows[0]["Appointment_Time"].ToString(); db.GETRecords is a function of the class that provides me sql-serv...

How can I do Linq to SQL like relationships with Class Objects?

Right now I can do this with Linq to SQL response.write(car.models(0).makes(2).model.car.ID) of course you wouldn't actually do exactly this but I'm showing how I can go up and down the chain of relationships Now I want to do the same with simple Class Objects that aren't populated by data from some other source but I can't go "backwa...

Datasets for Running Statistical Analysis on

What datasets exist out on the internet that I can run statistical analysis on? ...

How filter a dataset based on a nested dataset record count?

I have a Dataset i want to apply a filter based on a dataset-type field record count, something like: 'NESTED_DATASET_FIELD.RecordCount > 0' ...

Making datasets thread safe in C#

What's the best pattern for making datasets threadsafe on write? The best I can find by googling is 'implement a wrapper layer with locks' but at first blush this seems rather messy. Can someone recommend / point me in the direction of a good solution to this? It seems likely to be a problem that has already been solved somewhere. ed...