Returns Information In Data Table When I Type Select Statement
Jul 28, 2011
I am working on a front-end application program and cannot figure out what is giving me this error. The program is accessing an Access Database and filling a text box on the form. The error i keep receiving is "Index out of range", "No row at position 0". I have information in the data table, and when I type the select statement into a query in Access, it returns the information in the data table.[code]...
I want to be able to have a case for each data system data type. Obviousely the code below doesnt work but it should make it easier to understand my question.
The following VB line, where _DSversionInfo is a DataSet, returns no rows: _DSversionInfo.Tables("VersionInfo").Select("FileID=88") But inspection shows that the table contains rows with FileID's of 92, 93, 94, 90, 88, 89, 215, 216. The table columns are all of type string.
Further investigation showed that using the ID of 88, 215 and 216 will only return rows if the number is quoted. i.e. _DSversionInfo.Tables("VersionInfo").Select("FileID='88'") All other rows work regardless of whether the number is quoted or not. I understand that the numbers should be quoted just not why some work and others don't?
I got a table related to another table by orderref. I need to know what should be my SQL adapter command if I need to take some information from one table and some from another where orderref = "" or should I be making two separate SQLs?
I used to have this when I had only one table: myStr = "select * from orders where Orderref='" + txtorderref.Text + "'" Dim sqldaHistory As New SqlDataAdapter(myStr, nwindconn) sqldaHistory.Fill(myDataset, "orders")
[code]How would I switch on an object's type but using VB.NET's Select Case?I'm aware that some might suggest using polymorphism but I'm using a hierarchy of small message classes so that really wouldn't work in my csae.
Dim d as Date = DateSerial(Year(rptDate), Month(rptDate), 1 - 1) Dim conn as OleDbConnection = new OleDbConnection(connStr) Dim cm as OleDbCommand = new OleDbCommand()
[code]....
I know that d is the same date as the one in SQL server, specifically 3/31/2011 12:00:00 AM.
I want to make a report with a query "Select * from StudMaster where StudID IN ('S0001','S0002','S0003')"For this I created a parameterised command object in data environment and set the query as:Select * from StudMaster where StudID IN ( ? )
Then I called in vb code as:Dataenvironment1.command1 ("'S0001','S0002','S0003'")
Is there anything wrong in it? It is not working..Plz help me out, how can I make it run.
I am using the following Select Statement to retrive data from my .csv file database:
Code: Dim comm As New OleDb.OleDbCommand("Select *, Left([Street Full Address], IIF(InStr(12,[Street Full Address],'-')>0, InStr([Street Full Address],'-')-1, Len([Street Full Address]))) as StreetFullAddress From " &
i have a problem with a SELECT statement.I have a table <EisagogiStoixeion> with 6 columns, one of then is < AgonPeriodos>. I want to display data in a datagridview depending on the column <AgonPeriodos>. I use the Select statement like this :
SELECT * from EisagogiStoixeion where AgonPeriodos = '" & textbox1.text &"'.
Value not set for one or more required parameters. This is my problem on the fill command.
If i don't use the where statement everything is ok and i can see the data including the data from the AgonPeriodos column.
I am trying to read data from an excel sheet but there is an exception saying that no value given for one or more required parameters which I don't understand. Here is my code upto where the error is pointing to:
Dim MyConnection As System.Data.OleDb.OleDbConnection Dim DtSet As System.Data.DataSet Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
[code]....
The exception points to that last line MyCommand.Fill(DtSet) which shows me that there is a problem with my select statement. Previously my code reads the data and displays it without the where clause in the select but when I added the where statement so that it can only read data from rows where the column I has a value equal to 176, it instead gives an exception that shows that some required parameter is missing a value?
I am trying to retrieve information from one row that has four columns(name,company,address,phone) so that once it is displayed in 4 different textboxes, I can transfer to a word document.
I am trying to input specific information on a form.I have created an sql statement from a table that will out put 18 rows of data.I have opened a recordset and instituted a do until loop.I need for the program to look at each row and if the Standard Score = the value of a field I have on the form it takes the value of the other three columns in updates it on the form.I have created the code and it works for upto 3 (Do Until loops)records, but when I try to add a 4th in the SQL statement and put in another do loop my computer runs it but it acts as if it freezes up. [code]
I have three tables set up in a MySQL database called "event", "status" and "user". (as shown below:
EVENT TABLE (below) STATUS TABLE (below) USER TABLE (below)
and when I get data from the event table I use the SQL query statement below to bind the persons first and last names together as one variable called "name" and then bind that name to the respective user_id; and so on. However when I make changes to the event table it doesn't show the changes I've made. I'm certain it has something to do with the way I'm retrieving the data.
SELECT CONCAT(u.lastname, ', ', u.firstname) AS Name , s.message AS Message , DATE_FORMAT(e.timestamp,'%b %d %Y - %r') AS DateTime[code].....
Attempting to run an SQL statement to UPDATE a column in a table with new data. The column being updated is defined as varchar(40) and the new data is 41 bytes (varchar(41)). I get a generic 'data will be truncated' error message, but no detail on which column caused the problem. I've attached a sample VB program to illustrate the issue. In this scenario, Company is defined as varchar(40).
My question: Can I get a more detailed error message? i.e. can I get an error message that tells me the row and column that the truncation occurs in? Often times, I may be updating hundreds or thousands of rows and only one value in one column from the source file is too large for a database cell. As a related question, does each OLEDB provider create its own error messages. i.e. will the MS SQL Server OLEDB provider potentially give different text in the error message than say the MS Jet OLEDB provider?
Imports System.Data.OleDb Module Module1 Dim cn As OleDbConnection
I have a IF statement which is checking each row in the data table (for a match) and ELSE statement with commands which are executed if the If statement is not satisfied. Now I would like to write like so that it goes to the Else part BUT ONLY for values which are not satisfied in the IF statement. If I am more specific; I would like to calculate values if a match is found and just print them if it is not fond (usually there are both cases). Now the problem is the bold text; if there is a match found I don't want it processed BUT if the match is found I do. How can I write that?
currencyPosition = 0 Dim d As Integer = w + 100 For Each currency In Ary
I'm trying to run an INSERT statement to pass data from a datagrid to a table I have on my database. The problem I have is that the table has 6 columns and the datagrid has only 3. So I only want to pass those 3 columns but I get the error that the other 3 columns does not accept null values. I need to change the columns to accept null values. The other problem it is that I can't pass more than 9 records, if I have more than 9 record on the DataGrid it says "object not set as an instance of a reference" and it only add 9 records if I have more than 9.
Dim RowCount As Integer = datagrid1.Rows.Count - 1 Dim ColumnCount As Integer = datagrid1.Columns.Count - 1 Dim RowIndex, ColumnIndex As Integer Dim myconecction As String myconecction = My.Settings.DataSource [Code] .....
im trying to select a specific bit of data from a table in access using sql in vb.net. My select statement so far is sql = "select [UserAccessLevel] from Member where username = '" & tusername & "'"Useraccesslevel and username being columns in the table and tusername being a variable that stores the username im using to look up the useraccesslevel in the table.
Was wondering if any of you knew anything about select statements.
Im trying to fumble my way through selecting data from a mysql table and populating it to a combo box. I feel Im almost there, could someone look over my code and see whats going wrong?
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged Dim con As New MySqlConnection
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?
I have a form that displays data from a table in a DataGrid.I put an unbound Check Box Column in the DataGrid.Upon a user's selection of the various check boxes within the DataGrid, I need to save this checked data to a different table in the database.
Dim edit1 As OleDbCommand = New OleDbCommand("select * from [exporter] where exp_id='" & t1.Text & "'", con1)
now:-
t1 is a textbox
and in my table exp_id is "Number" now when i run this i get an error at the time executing reader (Data type mismatch in criteria expression.) but when i change exp_id properties to "Text" it run's properly
I want to connect to Sage Data, to the stock table, and select certain columns such as SKU, title, description, sales price and then select the rows I want and send these to an excel spreadsheet formatted in the style required for upload as product feeds to google shopping, shopzilla, amazon and Ebay etc.Each feed is formatted differently and I have to create these manually all the time so I want to try and automate the process. We would have much better control of our ecommerce if I could do this quickly with custom program.
So far I have managed, after a lot of disappointments, to connect to the sage data through the sage ODBC and populate a datagridview. I've only got this far by luck, with many errors due to me and system and software problems. I thought this would be relatively easy as I once used an app to create a word document programmatically with a very thorough guide, it's not looking so easy now. I have also added a check box column to the datagridview for selecting rows and thats as far as I have got.I was thinking perhaps of passing the selected data to an array and then creating and populating the spreadsheet.how to get selected rows from DGV.
I am wanting to pull data out a select table and wanting to use it locally as Read Only data I am stuck on how to write the data to the local Temporary table[code]...
