ADO.NET :: Converting The Single Value Returned With Stored Procedure?
Mar 6, 2011
I get a single value from a stroed procedure of type float. Even if I change it into Int or decimal in the procedure when I call it from my asp.net appliction with ExecuteScalar I get this error:
Exception Details: System.InvalidCastException: Object must implement IConvertible.
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.
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:
[Code]....
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).
this query works as designed and I'd like to have it be turned into a stored procedure. That is where I need because I'm kind of stuck. So here goes nothing :)
I am working on creating a stored procedure that will output a pivot table. In the pivot table will be either the string NULL or a number. How can I reformat this in ASP.NET so the NULL value becomes a blank cell in the gridview and the number (whatever it is) becomes an 'X' ?
I have a small query can we store three different stored procedure data into single dataset (in multiple tables). I am asking this because I have three stored procedure and when I run them simultaneously it takes less time to execute and when I run them separately it takes more time and I want to use all three stored procedure in page load. Environment - SQL Server 2005, ASP.net 2.0
I want to update two tables using stored procedures but my data not updating to data base
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; namespace INV_DN { public partial class Form1 : Form { SqlConnection con; SqlDataAdapter da1; SqlCommand cmd; // SqlCommandBuilder cb; DataSet ds; public Form1()
Here's a stored procedure I created that uses another stored procedure inside it to return a value:
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Note the 'exec dirinfo.dbo.d_searchempbyname @TicketSubName' part. That stored procedure will return a single record. What I need is to get a single column from that recordset (in this case, the email address of the employee), and store that value in a variable.
I tried nested ListViews but can get the display wanted.In my database I have a Category Table and a Product table.They share the CG_ID value.I want to make a stored procedure that will use two select statements to produce a single table.that can be used as a ListView DataSource.
I am trying to return single string result through a stored procedure and Linq. This works fine when I test the stored procedure but it is not returning the value to the page. The value returned is always 0 which is the return value. This is the stored procedure:
ALTER PROCEDURE Login @CustomerName nvarchar(50), @Password nvarchar(50) output As Select @Password=Password From Customers Where Customers.CustomerName=@CustomerName
This is the vb ALTER PROCEDURE Login @CustomerName nvarchar(50), @Password nvarchar(50) output As Select @Password=Password From Customers Where Customers.CustomerName=@CustomerName is the code created by the designer
This is the designer function <FunctionAttribute(Name:="dbo.Login")> _ Public Function Login(<Parameter(Name:="CustomerName", DbType:="NVarChar(50)")> ByVal customerName
As String, <Parameter(Name:="Password", DbType:="NVarChar(50)")> ByRef password As String) As IntegerDim result As IExecuteResult = Me.ExecuteMethodCall(Me, CType(MethodInfo.GetCurrentMethod,MethodInfo), customerName, password) password = CType(result.GetParameterValue(1),String) End Function
When can I use Stored Procedure? Is this useful for looping into multiple SELECT statements to return single value? How? Can anyone post some sample codes? I have text query and notice that my web application is slow and want to find ways to speed it up. Is there any possible ways aside from Stored Procedures?
what is the recommended data access strategy for the following environment: single stored procedure, many parameters, asp.net 4.0, sql server 2008, and the stored proc returns 11 different recordsets, all of which get displayed in various different elements too complex and specific to be handled by server controls.
Initially, I have tried to use stored procedure. But I changed my mind and preferred to call sql query in codebase with command text. However, it stills tries to find initially-called stored procedure (which is neither called or exists).I think that it is related caching. But I tried it with different browsers it did not work.What might be the reason?
how can I create stored procedure and write my select statement in it, I know how to create dataset then put type stored procedure and assign it to the sp ... what I want is writing my sp... how can I make it ?
check the following code, this is what I want to write put I don't know where or how !
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
i have a stored procedure with this values and i need just to make a button that will send something to "Equip" column,how to do it? write the values on my webpage and make a button to exec the procedu
I am trying to create the following stored procedure in sql server Lat and Lng are the parameters being passed from c# code behind .But I am not able to create this stored procedureit indicates with error saying undefined column name Lat,Lng
CREATE FUNCTION spherical_distance(@a float, @b float, @c float) RETURNS float AS BEGIN RETURN ( 6371 * ACOS( COS( (@a/@b) ) * COS( (Lat/@b) ) * COS( ( Lng/@b ) - (@c/@b) ) + SIN( @a/@b ) * SIN( Lat/@b ) ) ) END sqlda.SelectCommand.CommandText = "select *, spherical_distance( Lat, 57.2958, Lng) as distance from business [code]...
