But that makes the SQL query crash. It doesnt seem as though i am about to put anything related to "count" in my query or it will crash so is there any other way i can see how many records it returns other than that?
I know how to display or manipulate (add,delete,update,search) records using the OleDbDataReader and OleDbCommand class. But I'm clueless in getting the total record on a query.
I've written some code to try some thing. I don't get an error message. However, the record count return " zero". I declare some objects and make a connection. That all works fine. But no records.
Here's the code : Public Class Form1 Dim vtest As VariantType Dim cn As ADODB.Connection Dim rs As ADODB.Recordset Dim cmd As ADODB.Command [Code] .....
I'm fine with both C# and VB.NET..I have two tables. Authors and Books. It's a one to many relationship, Authors to Books. I'm writing a query to show how many books that each author has.[code]But in the Authors table, there are some authors without any books yet. For example, there two authors, Author D and Author E that have no books yet. I want to write query that includes all authors and number of ther books, even though they don't have any book yet, no record in the Books table yet.
I'm very new to linq and I'm trying to come up with a linq query against a dataset that will return a max count value based on grouping records.[code]...
I currently have the below code to list all tables in a MS Access Database, what I would like to do is alos COUNT the TOTAL records within each table and display that info in a listview control.
how to get that info.
This is the code I am currently using to get the list of tables from the database:
Dim userTables As DataTable = Nothing Dim i As Integer Dim restrictions() As String = New String(3) {}
my table name is "temp", and one of the field is item_id..how can i count how much item_id was added in this table...??is the code "SELECT item_id, COUNT(*) FROM temp GROUP BY item_id"it doesn't work.. i'm using OLEDB connection and can't use sql property
As you all know, If the dataBase requires a numerical value then an error will occur when the user tries to insert the incorrect data type. With the code below after the user types in a value beside an int value type then it will go into an Loop through more than what is needed. How can I apply the same logic but allow the program not to check the 60 rows (I set the row size to 60). I want to break out of it if there are blanks ONLY if a row is blank and not for a black cell, because if the user leaves one cell blank then it would loop through the 'for each' for how many rows that they is. Initially there are 60 rows.
MIS For Each item As DataGridViewRow In dgvLaser.Rows If IsNumeric(item.Cells(3)) Then Exit For Else MessageBox.Show("Check Record Count. Numerical values only..!") End If Next
Ive made a settings form for my latest StopWatch project. The stopwatch also includes a countdown timer. To set the time to countdown from, ive made a settings form in which you can enter a value into a textbox and when you start the countdown, it reads the value from the textbox and counts down from that value.
I have a form which uses a table adapter to read a table:Me.TblOrdersTableAdapter.Fill(Me.WorkDataSet.tblOrders)I want to change it so it only reads 1 specific record (variable at run time). This is for an Access database. To do that I could add a filter to the Fill query or make another query with a filter but I don't know the code to reference a field on a form. Can anyone supply the correct way to reference a field in a table adapter query, if it is possible, or direct me to a better way?
I'm using begintransaction to update multi-tables. I need to update one of the table while retrieving some records from that same table before commit. But it seem the table become locked after I inserted a record, and timeout at last.
Let us suppose a 256 colors picture (bmp or jpeg) with a size of 500 x 500 pixels.I would like to allocate a code (1 to 256 max) to each different color identified and put that code in a 500 x 500 table of a .xls sheet, all positionned at the right place.Additionnally, I would like also to place a chart illustrating the different colors and their respective code at the bottom of the sheet.
I'm trying to loop over record set with While sqlResults.Read() But it seems that if i only have one record in the collection it will skip it and won't enter the loop, is there some kind of fix to this?
To read a record in a binary file in VB^ I would define a type with all the fields specifying strings as STRING * whatever the length of the field was.
For example: Type Record Field1 as string *15 Field2 to as string * 20 Field3 as String * 10 field4 as byte(10) End Type Dim filerecord as record
I would the open my binary fiel and do a Get#1,, filerecord
The record would be read and all the fielsd would be in place.
Now with the new Structure we cant dimension an array in the Structure And wjhen declaring strings we can't specify the length.
I tried to create structire and use a stream binary reader. and just read afixed number of bytes into the type, The program says it canvert bytes to my fiels.
So how do I do this. Or has Microsoft in their infinite wisdom left no way to do this.
The LINQ VB code below is to read the first record data for database table ProductTable that has 3 colounms (or 3 fields):
TableCol1, TableCol2, TableCol3. The reading data is stored at variable MyArrayFirstRow. '-------start LINQ VB code in Visual Studio Web Developer 2008-------' Dim MyArrayFirstRow
I have a process that is a detail/Master issue. I read (into a dataset) my detail record based on several keys. Then I have to read each master record..check some fields/update some fields and then update that master. Detail is not changed. First.. How do I not lock the detail table during my select?
I hav a web service which pull records from a database and I am hosting these services in IIS which works fine but I am trying to retrieve the record and display the record in a listbox displaying the time field as the text for that record.I have created the following function
public sub get_data() dim dt as new data.dataTable dim service as ws webservice.webservice
I'm trying to read a word document for the purpose of obtaining a word count, I realise Word has built in functionality for presenting a word count but I want to write a little app that will omit certain parts of the document from the word count.
So far I have tried this code to open the document but I am getting an error 'Word.Document cannot be found' and 'Microsoft.Office.Interop cannot be found'. I have added a reference to the Microsoft Office 12.0 Object Library under the COM tab. I have Office 2007 installed and I'm using VB2005.
Imports Microsoft.Office.Interop Dim appWord As New Microsoft.Office.Core.Application Dim docWord As New Word.Document docWord = appWord.Documents.Open("c: est.doc")
I am trying to check a record in database before inerting a new record here is my code but problem is when i enter a names first alphabet it imediatly populate massage. i want to check it after entering whole name
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress Try Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &
I have added a column to a Datatable called CallsPerDay which is there to tell me how many telephone calls have been made on a particular day or days.Is there a datacolumn.expression which will allow me to Filter on the day, count the rows and then populate this added column with the result.
I have some reports that I use with the MS ReportViewer and I need to get a count of the physical pages (as opposed to logical page count) to use with a print dialog. I've implemented a workaround so the ReportViewer control displays the correct number of physical pages, but is there a way to get that value from the ReportViewer control? The only publicly accessible property gives the logical page count.
Basically, Is it possible to get a grids row count using jquery.if my grid has 20 rows in it not including the header or footer, i want to now the count of actual rows, this will tell my users how many tasks they have in their list.
