I have this query that returns the number of rows which is :
SELECT COUNT(*) AS MemberTotal
FROM Members
i'm trying to write a readonly property called count to return that value in string its suppose to display the result of my query in a tool strip status label, I have this in my code
Public ReadOnly Property count() As String
Get
Return memberAdapter.GetMemberCount()
End Get
End Property
but it gives me an error saying I can't convert dataset to string something like that and I don't have any idea on how to convert it I tried the Cstr but that didn't work?
I have the following routine (that works) but which is messy to update owing to the hand-typed strings it uses:
Private Sub ListDefaults() Dim conn As New SqlConnection( _ "server=bas047AUTODESKVAULT;Database=DWGDetails;Integrated Security=SSPI") 'Dim conn As New SqlConnection( _
I've created a small WPF app in VB9 to catalog our sizable DVD collection. This exercise has been more about learn programming than the need to have a movie database app, but I digress.The SQL database I created has a field for "Genre" that does not have an entry for all the movies in our collection. As such, when I run the method that filters the movie listing by "Genre" the compiler throws the "StrongTypingException was unhandled" error stating "The value for column 'Genre' in table 'Movies' is DBNull.".
I now understand where the DBNull problem comes from and have been searching for several hours to find a VB solution that converts the DBNull fields to strings on the fly during the LINQ query. I've found many solutions people have tried but, since I'm quite new to all this, none of them have worked for me. Pasted below is the method that throws the exception.
Is there a way to convert a string into a linq query? Searching for those words brings up tons of stuff unrelated to what I'm trying to do..For instance, this works, of course...
Dim lstMyQuery = (From item in htMyTable.values where item(0) = "Apple" Select item)
But somehow I want to do this:
Dim strQuery = "From item in htMyTable.values where item(0) = " & CHR(34) & "Apples" & CHR(34) & " Select item" Dim lstMyQuery = (Somehow run/convert strQuery as a query)
The reason is strQuery will be different each time depending on what the user has selected earlier in the program.R if lstMyQuery is already a collection, is there a way to add to it?
Dim lstMyQuery = (From item in htMyTable.values where item(0) = "Apples" Select item)
(this obviously doesn't work, but it's basically what I want to do...)
lstMyQuery.Add(From item in htMyTable.values where item(0) = "Oranges" Select item)
I'm writing an ASP web application with VB back-end. What I'd like to do is generate a url and display this in control on the page. For example if I have a label and a button on the form. The label is blank. When the button is clicked the following code fires:
Protected Sub btnGenerate_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnGenerate.Click label1.Text = "Hello" End Sub
What I'd like to have is a url that would point to my ASP Page with the words "Hello" in the label.
I am still learning VB and operating VB 2005 for school. Challenging issue recently arose and would like advice from someone smarter than I .... When writing code to query several elements from a user,such as: Street number, street name, city, state, zip ... all posed as individual response questions. I want the ultimate displayed answer to show in a single line. When I write to code for that, I get the response in a single line, but they are all jammed together in the cout result screen display, with no spaces between answers (e.g. 2118Winona AveMontgomeryAlabama36102). I want a blank space to display between elements (e.g. 2118 Winona Ave Montgomery Alabama 36102). How do I cause the result line to include spaces?
In the user input of a textbox I would like that the user can input a formula to make it easier for him. So instead of inputing 400 I would like the user to have the possibility to input as 8*50. Is there a command for vb2008 to calculate the answer of this formula inputed by a string ?
I am using Visual Studios 2008. I'm trying to make a basic addition calculator. It consists of 2 input text boxes, 1 output box and one button. Below is the code I have which works, however, instead of just displaying the answer, I want it to display the entire arithmetic problem including the answer. For example. Instead of just giving me the answer of "6" in the output text box, I want it to say "3 + 3 = 6".
Here is the code I have so far. Public Class Form1 Private Sub btnAddition_Click_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddition.Click Dim num1, num2, sum As Double [Code] .....
I am new to LINQ, how to convert the following SQL query to LINQ? SELECT Date,ShiftName,Max(Score) AS Score, 1 AS IsPreferred FROM Temp_Nurse_Fill_RequestNumbers group by ShiftName,date
i'm currently making an app that needs to run a query between two dates. this app will run automatically, so i need to put the dates as today and yesterday, essentially.
SELECT EqID, MakeID, Model, Description, (SELECT MAX(EvDateEnd) AS MaxOfDateEnd FROM tblEvent WHERE (EqID = tblEquip.EqID) AND (Event = 'REG')) AS RegExpire,
[code]....
For example, I want to get the Max EvDateEnd from the Events table for each record in tblEquip, but not all records in tblEquip have the "REG" event, while others have multiple REG events.Some events (like EAE) I leave the tblEvent.EvDateEnd field blank to show the event is open and ongoing, such as issuing a vehicle to an employee(entity). when the vehicle is returned I enter the date in EvDateEnd essentially closing the event.
I have an installment payment program which have Hijri date (Saudi Arabia) and I already have the code for it's converter inside the forms (using datetimepicker for the Gregorian & maskedtextbox for the Hijri). I'd like to know how can I convert or produce the corresponding equivalent Hijri dates of a series of Gregorian dates generated in my table? I am using SQL query for this. This triggers when I click my Save button for the computation of the premium terms of the customer having an installment payment plan for an item boughtIs there an SQL query to convert Gregorian dates saved into Hijri dates to an Access table?By the way, I am not using any SQL server or Oracle,
I'd like to convert a string which contains a decimal number into string that contains the binary value, the octal and the hexadecimal value of that decimal number.Afterwards I also like to convert a string containing a binary, octal and hexd. number into a decimal string.Basically I'm looking for the functions:
dec2bin dec2oct dec2hex bin2dec oct2dec hex2dec
I'd not prefer to rewrite a function, I'm sure the framework must have these functions already.
Is there any way to convert null terminated string to normal string.I mean I can easily make a program to find the location of vbnull but there has to be a built in function for that.
how can i convert these datatypes: date to string and integer to string.Because it must be in a string datatype when I display it in a datetimepicker and textbox.
I have a form that queries a database into a dataset then sets textboxes to values from the query. I have a status field I want to be able to control so I created a combo box with typed in values(Active, Inactive, Missing, Broken,Calibration). The purpose of this form is to view the current information on the item and edit if need be. I want to display the current status in the combo box. I can't get the combo box to display the value from the query. How do I do that.
I would like to send json data from a HTML table to the ASP.NET code-behind and update the data in and SQL Server database. The code and JSON for the TableProductToUpdate() is below.
function UpdateProductTable() { $.ajax({ type: "POST",
I used the query designer to create a qry from a datagrid view in vb2010 express, the idea was to work out which diver logged the most minutes in the water. here is a copy of the sql syntax:
SELECT MemberID, Name, SUM(DiveTime1) AS D1, SUM(DiveTime2) AS D2, SUM(DiveTime1 + DiveTime2) AS s1 FROM Triplog GROUP BY MemberID, Name ORDER BY s1 DESC
I have this situation where I have a SqlDatasource control and the select query is like:
SELECT col1, col2 FROM table1 WHERE colDate = @date
The source of @date is a label with the text: 2009-05-29 12:06:00 I get the following error when I run the query:
Conversion failed when converting date and/or time from character string
I tried using convert(datetime, @date), as well as different date/time formatting of the label itself. Everytime I get the error.
However, when I run the query in the management studio like:
SELECT col1, col2 FROM table1 WHERE colDate = '2009-05-29 12:06:00'
I found out that the @date is parsed as 05-29-2009 01:30:00 TT I don't know where the TT is coming from? And I'm sure SQL Server wouldn't be able to handle it?
I'm currently doing a project which requires me to count a specific number of records who have a certain checkbox marked as true, passed questionnaire, it then needs to display this result in a textbox when the form is loaded. However i am having problems displaying the result in the textbox, this is my current code.
Imports System.Data Imports System.Data.OleDb Public Class frmCandidateGathering
I am facing a problem displaying the result of my "select *" query on the form . Here is my code:
[code]...
But when I write this code and run my form I am not able to see any records present in my database tables being displayed on my form. I have inserted a DataGridView on my form . What changes should I do to my code ?
