In my .NET application I have to get results from a MS Access database. I would like to add error checking to make sure a row was returned from my SELECT statement.
View 1 RepliesI'm relatively new to VB. I want to perform a SELECT statement that uses a variable to return a value, example;
mysql> SELECT room_description FROM room_descriptions WHERE current_room = 'someVariable';
And display the result in a TextBox i.e. TextBox.text = someVariable.
So how do I perform a query from VB that passes a variable? How do I assign the result to a variable?
I have a table which contains a list of products for a company. They input data about how much stock they have and also the level at which they want to be reminded that they need to order new stock.
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I want to list all the true results in a form which the user is then able to navigate through. What would be the best way to go about doing this?
I need to create a Select Case statement to assign the per check processing fee:user inputs number of cks into textbox that i need to validate the input if user puts in a negative amount.
10 cents for <=20 cks written ea month
8 cents <= 20 to 39 cks written ea mo
6 cents <= 40 to 59 cks written ea mo
4 cents for 60 or more cks written ea mo.
Also, I have a label programmed to display the $10 monthly fee thats has to be included into the: Total monthly fees.
Here's the coding I have so far:
Const decSERVICE_FEE As Decimal = 10D
Const decTWENTY_OR_LESS_CHECKS As Decimal = 0.1D
Const decTWENTY_THRU_THIRTYNINE_CHECKS As Decimal = 0.08D
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I would like to define Sorted to be of type ErrorProviderMessageCollection, which is what unsortedCollection is defined as.
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I am trying to read some data from an Excel 8.0 worksheet using OLEDB thusly:(Warning - contains curly braces)
Code:
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
using (DbConnection connection = factory.CreateConnection())
{
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The problem is that for some columns it sets the data type to be Double even though the spreadsheet column format is "Text" and teh column contains non-numeric data. Then when it gets to that cell it returns DBNull instead of the text value.
I am trying to return a json string via jQuery of an object using the following function. The problem I do not seem to be able to overcome is my json result comes out the other end wrapped in double quotes.
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I want to be able to get the one record I return from a table and put the results into text box's directly rather than put the result into a combo box and then transfer the text across.
Private Sub GetStationStats()
conn.ConnectionString = myConnString
Dim myCommandStationStats As New MySqlCommand
Dim myAdapterStationStats As New MySqlDataAdapter
Dim myDataStationStats As New DataTable
Dim SQLStationStats As String
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The fields Signon and SignOff, plus many others which I didn't include in this sub. Above code does work, its how to get it into a text box.....
I am returning to VB and coding after several years of trying to be out of coding :)
I would like in grabbing data retrieved from a SQL database call into an array of sorts so that I can quickly close the database connection. I am having some trouble remembering how to do this. Most of the posts I've found say to use the dataSet() functionality, but I do not have a table name for the structure to mimic. I am selecting from several tables on a remote server.
im calling functions with an IF statement but then not using the returned value for anything... is there a reason that i shouldn't do this? in my form i call the function to run...
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I use in my Project the IfExistsTable function; in order to see the existence of a table.
For this purpose I use the Select statement as follows.
MASQLComm = New SqlCommand("SELECT COUNT(*) AS [RecCount] From sys.tables WHERE name Like '%" & tName & "%'", SQLConn)
RecCount = CInt(MASQLComm.ExecuteScalar)
After that I take the number which returned in RecCount. Until now the numbers was 1 and 0
And so I was turn the numbers in True or False.Now suddenly the returned number is 2 which I can't understand what it means.
I am creating a application in VB.net. I've just managed to get a mssql connection going with the many people on this forum. I am now trying to establish a connection with Sybase server/db. Upon entering the username and password from my application front end, I get the following message:
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I am creating a application in VB.net. I've just managed to get a mssql connection going with the rom many people on this forum. I am now trying to establish a connection with Sybase server/db. Upon entering the username and password from my application front end, I get the following message:
View 1 Replieshi there,first of i know nothing at all and my goal is to make a app for xp to check a database and check/patch a iso and then to burn the result to dvd-dl, basically like a app called abgx360 checks the database then like xbox backup creator burns the game, i'd like to make a app to do both, i'm going to college next year in september to learn programing c+ andf a few other things, but thats a longtime away.
View 14 RepliesI have the following SQL:
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I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?
A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.
If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If
I am using a Command Builder for OLEDB, I populate the Data table from the database, and then I use data adapter's Update method to add or update the database successfully.
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I am using an INSERT INTO ... VALUES statement in the following matter to insert data into a new row of a database:
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How can I substitute variables for the explicit values of X and Y in this statement (for example, variables XName, XAddress supplied by user input via text box)?
few fields are not text because I am getting an error - data type mismatch in creteria expression. I am using VB.net 2008 and Microsoft Access 2007. these are the columns I am not sure how to handle:
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I have a stored procedure that has a if statement in it. This if statement checks a count select. If it's greater than 0, it selects a set of data, if it's 0 then it selects a different set of data. The problem I have is in the vb code, I have been trying to check a value to see if it's there. If it is, then I add the value to a couple labels, otherwise I don't Here is the vb I have commented it so you can see what I mean.
Try
Dim lrd As SqlDataReader = selectCommand.ExecuteReader()
While lrd.Read()
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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?
I am getting a Syntax Error in INSERT INTO Statement when trying to simply create and add a new row to the Customer table (tblCustomer). My code is as follows:[code]
View 3 RepliesI seem to be having a problem when attempting to insert a new record into my database through vb.net. From what I can gather, there seems to be an error in the code that the command builder (cBuilder) is creating for me. [code]...
View 5 RepliesI am suddenly getting an into statement error and can not seem to figure out why When I try to update a .csv file I get: syntax erroe in INSERT INTO statement When I try an update a textfile I get: The INSERT INTO statement contains the following unknown field name: 'SellingPrice'. Make sure you have typed the name correctly, and try the operation again.
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I am doing a sql statement to get all the data that starts with "A" in the database.
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I'm trying to create this select command against Access Database----Keeps giving me error saying operator is missing I just can't seem to figure it out
da2.SelectCommand.CommandText = "SELECT RecordList.RecSchNo, RecordList.RecTitle, RecordList.RecReasonCode" & "FROM DispReasons INNER JOIN RecordList ON DispReasons.ReasonID = RecordList.RecReasonCode" & _
"WHERE DispReasons.ReasonID =?;"
SchultzMan
I have something that I want to do and what looks very simple, but I cannot get it to work. I want to build a function that gets as input a xdocument and some other strings. It should have a return that contains a filtered part of the xdocument in a way that I can use it as input for a new Linq function. This is what I mean:
Private Function fncGetFilteredDecendantsOfNode(ByVal xdocDoc As XDocument, _
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I'm using the following code to work out the next unique Order Number in an access database. ServerDB is a "System.Data.OleDb.OleDbConnection"
Dim command As New OleDb.OleDbCommand("", serverDB)
command.CommandText = "SELECT max (ORDERNO) FROM WORKORDR"
iOrder = command.ExecuteScalar()
NewOrderNo = (iOrder + 1)
If I subsequently create a WORKORDR (using a different DB connection), the code will not pick up the new "next order number."e.g.
iFoo = NewOrderNo
CreateNewWorkOrderWithNumber(iFoo)
iFoo2 = NewOrderNo
will return the same value to both iFoo and iFoo2. If I Close and then reopen serverDB, as part of the "NewOrderNo" function, then it works. iFoo and iFoo2 will be correct. Is there any way to force a "System.Data.OleDb.OleDbConnection" to refresh the database in this situation without closing and reopening the connection. e.g. Is there anything equivalent to serverdb.refresh or serverdb.FlushCache
How I create the order.I wondered if this could be caused by not updating my transactions after creating the order. I'm using an XSD for the order creation, and the code I use to create the record is ...
Sub CreateNewWorkOrderWithNumber(ByVal iNewOrder As Integer)
Dim OrderDS As New CNC
Dim OrderAdapter As New CNCTableAdapters.WORKORDRTableAdapter
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I want to execute an SQL statement and put the result in to a data table.
Sub getvehicletypes()
Dim dt As New DataTable
Dim intLine As Integer = 0
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Once Ive got it in a dataset I need to work out how to search the dataset for a code and return the corresponding description and vice versa
I'm trying to access the Count Property on the array of rows returned by the datatables select method, this is after converting the Web Project to 3.5
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