How To Write A SQL Statement Programmatically With Datasets
Mar 29, 2009How do i programmatically execute a SQL statement using datasets?
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Use If Statement During Select From Linq To Datasets?
Dec 14, 2009I have this LINQ statement [code]...
Is there any way that I can use if/iif within select ?
Write Into A Datasets From A Access Database?
Sep 6, 2010this is my code and it has an error "Command text was not set for the command object."Dim con As OleDb.OleDbConnection = New OleDb.OleDbConnection()
Dim sSql As String
Dim command As OleDb.OleDbCommand = New OleDb.OleDbCommand(sSql, con)
Dim adapter As New OleDb.OleDbDataAdapter(sSql, con)
[code].....
Make A Database Application That Can Write/retrieve Cells/datasets From/to A Database
Apr 8, 2010i need to make a database application that can write/retrieve cells/datasets from/to a database i buyed a book in there was an example of how to create a database application while debugging i had the "Object reference not set to an instance of an object." error and it highlighted this code
objDataRow = objDataSet.Tables("KlantenTable").NewRow
now the problem is here i declare something later in the code i write to it
objDataSet.Tables("KlantenDataTable").Rows.Add(objDataRow)
[Code]....
How To Write An If Else Statement
Mar 2, 2010i have a question about how to write an if else statement. I was experimenting with vb 2008 and wrote a program that adds few numbers together and displays the result in textboxes. for example i input the following 4 number in 4 different textboxes
14 3 1 5
and the result i get is 15 8. I was trying to simulate adding times together(eg 14:03 + 1:05 = 15:05). Everything seems to be working fine but how can i place "0" if the output for the minutes is less that 10? eg instead of having 8 in the textbox i would like to have 08.
Write A Sql Statement That Has An IF Condition?
Feb 25, 2010I need to write an sql statement that has an IF condition in it
This is my current statment:
"SELECT * From History Where DelNoteNum = " & delNote & " ORDER BY StockLoc"
What I need to do though is if the StockLoc > 4000 then group by ProductCode. I definatly only need to do this if the stock location is greater than 4000 though.
Write An If Statement In A Button_click Event?
Apr 29, 2009I need help with a month calendar. I want to write an If statement in a button_click event. I need an If statement that says if one date is selected then a label becomes visible. I cannot figure it out.
View 1 RepliesWrite The Pseudo-code For An If..Then Statement?
Jan 29, 2010Write the pseudo-code for an If..Then statement that determines the apropriate tax rate for a given annual income level using the guide below:
Under $20,000 = 2% income tax
$20,000 - $50,000 = 5%
$50,001 - $75,000 = 10%
This is what i wrote:
If Annual Income is < $20,000 Then
income tax = 2%
If Annual Income is $20,000<= $50,000 Then
[code]....
How To Write A Contains Statement To Match A Member Of A Class
Nov 17, 2011If I have the following structure:[code]How can I select it in a conditional like this? [code]I know that myUsers.Contains(.ID = "1") is totally wrong, but I am curious how to do something like that?Is it possible? Is this a job for LINQ?
View 3 RepliesUse The IF ELSE Statements OR The Select Case Statement To Write?
Oct 7, 2011Im trying to figure how to use the IF, ELSE statements OR the Select Case statement to write this program.I'm using Visual Studio 2010. The program is suppose to allow the user to input their weight in a text box and from group box 1 the select whether theyre male or female using the radios and they select inactive or active from group box two and the calculate but will determine how many calories they should intake based on the criteria below.
[Code]...
Write For 3 Tables Left Join Statement?
Mar 11, 2010Table 1 has fields: A, B, C, Table 2, there are fields: D, E, F, Table 3 has fields: G, H, I
Connect the condition that A = D and F = I
provide a look at Table A left join B, C of the SQL statement
Write If Else Statement To Check If Number User Enter Follow Within A Range?
Aug 25, 2009How to write a if else statement to check if the number user enter follow within a range.
View 5 RepliesWrite A LINQ To Objects Statement Where The Relationship Is A Grandparent, Parent, Child Relationship?
Feb 3, 2010Basically, I am trying to write a LINQ to Objects statement where the relationship is a grandparent, parent, child relationship. (You could also call it a Master Detail relationship.)
Dim coverages As New List(Of Coverage)
Dim coverage As Coverage
For Each rl In oClaimsPolicy.RiskLocations
[code].....
If Or Statement In My Form - Way To Write Without All The "Or" S ?
Nov 24, 2009I have an asp.net web form that uploads files. Part of the code seems messy to me, but I can't figure out another way to write it.
Here it is:
CODE:
Is there a better way to write this without all the "Or" s ?
VS 2005 "If" "Else" Statement - IF Filetype Does Not Return A Value When Write It To File
Aug 26, 2010[Code]....
Apparently, filetype refers to the extension of the program. But I do not want it to read .exe and .lnk programs. So how can I include this "If Else" statement into the one stated above?
How To Use DataSets
Jul 30, 2009I'm trying to work with an ODBC driver for Interbase in VS2008 (vb). I succesfully inserted the data tables I want to use in the project datasource. Then I want to add some rows in one of the tables of the datasource. I used myDataSet.addTABLENAMErow(field1, field2, ...).The compiler gives me no error, but when I open the database with InterbaseConsole, the line I've add is not there. Do I do something wrong? Must I open/save the database (how do I do so). I've tried meDataSet.AcceptChanges whitout result.I'm not used to work with Datasets and tables...
View 1 RepliesDebugging And DataSets?
Jan 29, 2010Anyway to view the content of a dataset or datatable in debug? I don't mean looking up a specific element of the dataset but to view the hole thing.
View 4 RepliesDifference Between Two Datasets?
Mar 14, 2009difference between the two statements given below
1. Dim ds as new DataSet
2.Dim ds as DataSet = New DataSet
How To Combine Two DataSets
Oct 8, 2010I'm trying to combine two datasets, each with 1 datatable and each having the same schemas. Datatable 1 would have a list of records. Datatable two may, or may no, have some or all of the records from table 1 plus more records. I would like to remove all the records from table 2 that are present in table 1.
This is what I got so far:
For Each table1 As DataTable In ds.Tables
For Each row1 As DataRow In ds.Tables(0).Rows
ds.Tables(0).PrimaryKey = New DataColumn() {ds.Tables(0).Columns(0)} 'Where 0 is the index of the column that's your key
row2 = ds2.Tables(0).Rows.Find(row1("ID"))
'if its found, delete it
Next
Next
How To Join Two Datasets Together
Aug 2, 2011how to join two datasets together.
First Dataset
Dim sql As String
sql = "SELECT payment.Debtor, SUM(Value_invoice) AS before_this_month,debtor.nama FROM Payment INNER JOIN dbo.debtor ON Payment.Debtor = debtor.debtor" & _
[code]....
Now i just want to either inner join or left join PaymentBeforeThisMonth and PaymentThisMonth into another dataset?
How To Loop With Datasets
Feb 10, 2011I have a dataset that contains only employee ID's. I need to loop through that dataset and for each employee ID I need to loop through several other datasets and pull data. I need help with this looping syntax. Here is a sample of some code that I am receiving an error with:
Dim EMPID as Integer
Dim CommandEmpid As New OleDb.OleDbCommand
Dim EmpidDS As New DataSet
[code]....
How To Save Datasets
Mar 2, 2011I have a form that needs to load data for 20 different combo boxes - the data is always the same. To get the combo boxes to function properly i need to create a separate dataset for each combo box. Doing this when the form loads takes it about 7 seconds each time a search result is double clicked and the form pops up displaying the correct data. The form is bound to the main table. Is there a way to store these data sets in memory somewhere so the user can close the form but still have them loaded? I can put this code behind the login form and it works until the form is closed, then the combo's no longer load.[code]
View 8 RepliesTwo Datasets In If Operator
Jan 8, 2010i want to check if datasets have changes and after that use msgbox (vbYesNoCancel) when program closes ,when i wrote this code it had error "Operator 'Or' is not defined for types 'System.Data.dataset' and Boolean"..[code]
View 2 RepliesUse Datasets In Other Forms?
May 17, 2009I want to use my main dataset (dbds) on a second form. It's simple, on my main form, the user clicks a button, opens a new form, they enter an item number and I want to find that row, and change a value in another column of that same row, and have that be in effect onthe main dataset to send back to the database.[code]...
View 1 RepliesSQL Statement Doesn't Work - INSERT Statement Works Fine In The Form Load But Not In The Button Click Event?
Oct 14, 2009See
Public Class Form1
Dim sql As String
Dim conn As New OleDb.OleDbConnection
Dim da As New OleDb.OleDbDataAdapter
[CODE]...
The problem, The INSERT statement works fine in the form load but not in the button click event?
If <expression> Then <statement [:statement]> Else [statements] In Concrete Form?
Jan 1, 2010I was convinced that If <expression> Then <statement [:statement]> Else [statements] in concrete form of If a = b Then SayHello() Else SayBye() End has sense. I read article on msdn on If-then-else, but I forgot why I was reading, so I concluded, that snippet above means this
If a = b Then HelloIsSaid : IsNotEnded Else ByeIsSaid : IsEnded But I have tested it now, and I see, that Else without statement is nothing more than decoration. It would be pretty good if it had function I described. Do you think its good request? Or do you know any circumstance where this Else has some function?
Making A Next Statement Into A Loop Statement In Visual Basic?
Jun 8, 2009y friend and I are re-learning Visual Basic, and we are stumped on this bit of code.
For intAsterisks As Integer = 0 To intLine - 1
lblAsterisks.Text = lblAsterisks.Text + "*"
Next
Sql - Perform An Inline Select Statement In A LINQ Statement?
Jun 24, 2011I have the following SQL:
[Code]...
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?
Accessing DataSets Throughout Project?
Dec 3, 2011I have declared a dataset (let's call it 'Fred') as public in a VARs module. In the main form in a sub routine called at the start of the project I connect to an Excel spreadsheet and read it into the 'Fred' dataset into one table (called 'Table') I then bind the dataset table to a datagridview and I can see the spreadsheet. Which is very nice :-)
Having loaded the dataset I want to be able to get some values so I created a button and used the following
msg = Fred.Tables("Table").Rows(0).Item("Name")
I think this should get the value in the first row and in the column called 'Name' in the table called 'Table'
But I get an error when I click the button 'Object reference not set to an instance of an object' which I think means I need to use the 'New' keyword...
So I added to the button
Dim Fred = New DataSet
But I get the same error.
Now I have to admit that I've never really got my head around how to use the 'New' keyword and would have hoped to be able to get data from a dataset through my entire project - especially as I've declared it as 'Public'. Surely if I use 'New' all over the place then I create new datasets
C# - How To Create And Manage Several Datasets
Dec 1, 2009What is the best way for me to have several datasets ?i've thought about creating a routine for creating datasets with a number in their names, each one with the desired data, but that's not very intelligent (although might work)i'd like to create what would be like an "ARRAY OF DATASETS"
[Code]...
(obs, i've done the same code loading one XML to one dataset and it works perfectly, i've gone back and forth more than one time to assure that it isn't just a logical mistake, it's syntax and lack of programming knowlegde.
