I want to run a SUM on a particular against the DataSet returned by a SqlDataSource. How can I access the DataSet stored in memory that is returned by the SqlDataSource to run this calculation?
View 2 RepliesI am having some difficulties with a particular task. I am creating a support desk intranet application and I am trying to write a method within a class within a namespace which will form a generic database connection which can be called from any of the aspx pages so that I have the dbconnection logic in one place; you know, going along with the 'DRY' (Don't Repeat Yourself) mantra.
The Namespace:
SUPPORTDESK.SQL.dbconnection.pullData()
Objective of the method:
To provide any aspx code behind file with an SQL Server 2005 Express Connection and if possible return the data from an SQL Query. This is where I need advice do I create the method such that it simply forms the connection and returns a DataSet or that it returns an SQLConnection object? If i've got things back to front and upside down don't worry I'm a beginner with ASP.NET. The Method so far:
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If I'm on the right track how do I access the data returned in the DataSet?
I've managed to connect to the database and return a record based upon a login name. I can itterate through the rows printing out the password but I know there's only 1 row (or can test for that) so how do I get the value of the password for the one row without the loop?
Dim supervisorAdapter As New SupervisorTableAdapters.SupervisorTableAdapter
Dim supervisors As Supervisor.SupervisorDataTable
supervisors = supervisorAdapter.GetSupervisorByLogin(login)
For Each count As Supervisor.SupervisorRow In supervisors
Response.Write(count.password)
Next
This may not be the correct place to put this as it is both a stored procedure AND Visual Studio 2008 problem.
I have the following stored procedure:
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I have been mokeying around with it because of what is happening. I have a dataset, call it dataset1. I drag this stored procedure onto the dataset. I EXPECT a datatable to appear, instead the data set adds this store procedure to the queries table adapter and sets the exec mode to 'NonQuery' which unless I am very mistaken, means "don't expect a dataset back from this' when in fact you DO expect a dataset back from this.
The SQL server is a Windows 2000 Server running SQL 2000. It has never caused us a moments grief since we set it up oh-so-many years ago.
If I connect to a different database and drag a query into the same dataset I get a datatable as I expect. I cannot see where / how this procedure could be wrong. The query when executed returns exactly the data I expect, in the format I expect (looks like a table, acts like a table in the Query analyzer).
Im currently filling a dataset using an SqlConnection and a SQLDataAdapter:
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This method is causing other sql connections to timeout. What I would like to do is an SQLDataSource to fill the dataset. Is this possible?
I have a stored procedure 'RoomIfExists' on my sql server (it does work). It takes a string variable for the Room_No and returns either '1' or '2' depending on the result of the query.
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I need to know how to run the sp in c#, passing the variable Room_No and then pull the result from it.I am using a data reader.
I have a FileSystem based asp.net 2.0 app that uses Sql Server 2005 Express database.
I have only one dataset for this app with only 4 tables. After i have completed it to a part, a co-worker have added some Classes to it, which are not in same namespace of myBLL classes.
Then i tried added a new table to the dataset. It like all other tables in that dataset uses SQL Statements to access and manage data.
The problem started after i added that new table. I cannot access it from code. I can access all previous TableAdapters but not this new one.
I am trying to tie a sqlDatasource to a Stored Procedure. The stored procedure looks like...
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I have a asp.net page that has several SqlDataSources defined that feed data into some graphs. The problem is that the graph product does not handle "no data" very well, and throws an error. I'd like this to handle the situation more gracefully-- so I need to check whether the SqlDataSource returned data or now before rendering the graph (and if not, just post a message saying "No Data" or something).
Is there an easy way to check if the data source returned data, and do this if/then without a bunch of code behind?
Today I am facing the problem with Typed DataSet using DataSet.XSd file, And How to fetch, Delete and Update the Database through Dataset.xsd file.
View 9 Replieshow do i copy required row in dataset to a new dataset. i have bind a xml into a dataset and i need to display say row 3 to 5 only so i do a for loop but i have encounter problem when trying to copy the rows to a new dataset.
do i have to write the xml to datatable and bind it to dataset and from there copy over ?
I have this specific task: I have a contacts table, and when users view a specific contact in details page I want to display a button in the page (doesn't matter anywhere, but inside the detailsview control next to the "edit" hyperlink is better), when it's clicked I want to grab all the info of this contact instance and write it to Response so user can save it through the save file dialog. So far I have two problems1. How do I access the contact? it's displaying on the page but when I tried detailsview.dataitem it returns null, e.result in the datasource selected event handler also returns null...2. I can get the button (outside the detailsview control) to trigger the file download dialog, but how do I achieve the same thing if the button is placed inside the details view which is in turn inside a updatepanel?
View 1 RepliesI have recently converted all my applications to framework 4.0 and am very happy as a whole.
I have, however, run into a bit of a bind: i have exposed quite a few web services that have methods returning datasets.
Clients immediately started complaining that the order of the tables within the returned datasets were different. I investigated and can confirm that the webmethods are indeed shuffling the tables within the datasets. The order of tables in the method result are markedly different from the table order in the code before being returned.
My question is: is it possible to hard code the order of tables within the dataset being returned by a webmethod? I know that clients should, ideally, be referencing the tables via the table names, but that is - unfortunately - not the case in the really real world.
using vb.net 2005 and crystal reports. in the vb.net code I am querying the database, processing the results and then binding to the crystal report.
What I need to do now in the code is this: I need to create a new page to display the results so that there is one page for each row in the dataset that I'm binding to the report.
have 2 tables in SQL 2000 developer edition identicals, Prereception and eceptions, on the table Recepcions I have the following trigger:
CREATE TRIGGER [AumentaInventario] ON dbo.Recepcion
FOR INSERT
AS
declare @Codigo nvarchar (50)
,@Cantidad int
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im working on visual Studio 2010, and i have an error on an update.
this is the code in VB.
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Thats the code and the error is:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.`
i have two sqldatasource controls. one i use to display data in textbox's ,filter'd by a select parameter in page behind code. Once checked, i want to copy this data to the other datasource ,by selecting checkbox.Then display this data in detailsview control.
At present the two datasource controls declared , render data to the page simultaneously during pageload. I want to first check data in textbox's from first source, before second datasource is rendered to screen. note, both are filtered by a page variable. i wish to leave the textbox datasource control in situ, as other controls and code depend on it.The other detailsview datasource is my problem?
When a sql query returns NULL , I can use the following code to evaluate:
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When a sql query returns nothing, neither IsDBNull nor is Nothing works. I don't know why some sql queries return null while some return nothing when there are no data returned. But anyway, can somebody tell me how to evaluate nothing value returned in sql datareader in vb.net? When I put the cursor over signInfo variable in debug mode, I can see Nothing show as its value. But the line does not work
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I am viewing items returned from a dataset in an Infragistics chart control. My problem is that due to a weak point in the control, I am left looking for a way to manipulate the height of the chart based on the count/number of items returned by the ObjectDataSource(DataSet).
Does anyone one have an existing C# sample they could let me view of accessing the count of records returned within the code-behind of a page that I could then use within a case statement to set the hight of the control?
I'm developing a website using asp.net 2.0 . I have retrieved a record from database through the query.
SqlConnection con = new SqlConnection(connectionstring);
con.Open();
String SQL = "SELECT * FROM Table where attribute1 = value";
SqlCommand cmd = new SqlCommand(SQL, con);
SqlDataReader reader = cmd.ExecuteReader();
Sometimes, there is no record matching this query and so null value is retrieved. My question is how to find that the null value is returned. Since If (no record found i.e NULL) certain actions needs to be done and if (records found i.e NOT NULL) ceratin different actions needs to be carried out.
I'm attempting to further reduce a dataset/table by various user input. Part of this process is grouping the data by a timestamp prior to a summation. I'm trying to use LINQ and cannot get the data returned that I need.
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I am trying to run the following SQL query
string strConString = ConfigurationSettings.AppSettings[ "conString" ];
myConnection = new OdbcConnection(strConString);
myConnection.Open(); // open connection
string strSelect= "select * from tbl_howells_product_data where title like" + "'" + strsearch + "%" +"'" + "order by product_id asc";
OdbcCommand myCommand = new OdbcCommand(strSelect, myConnection);
dtrReader=myCommand.ExecuteReader();
The problem is I need to check to see if any data has been returned from the SQL query, if there are no rows/ data returned by the query then I need to display a message to say that there aren't. I know that there isn't a 'number of rows method' for the dtrReader, so does anybody know how I could do this?
inside procedure, how to know a sql returned records or not?
View 7 RepliesI have a stored procedure that returns 3 tables within the single recordset it returns. If I set a SqlDataSource to get data from this procedure, it works, but it only returns the first table. I want to have a GridView display the data from the 2nd or 3rd table using a SqlDataSource, but I can't figure out how to specify a particular table.
While there are some posts discussing this out there, I can't get a definitive answer about whether or not this is even possible (?). In a worst-case scenario, I can create another SP that only returns the 3rd table - but that creates a little maintenance headache that I would prefer to avoid.
i have a sqldatasource with complicated SQL select statement, but need to use that data. can i use that select statement to fill a dataset (or array)?
View 4 Replies