My problem consist in show values into a cell of a DGV control, for example:MySQL Table:
ID - Name - Price - Type
1 Mouse Pad 2.85$ - a
2 Keyboard 10.50$ - a
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I've populated my DataTable will all the results from a SQL search. Upon a button click I want to populate a combobox with all the results where a condition is met. My DataTable as a column called UserID and I want to add all results where the UserID is equal to a set value (for example 12). I can do this to add all results and I guess I could add a if statement inside this to be If Entry.Tag = 12 Then but is there a better way?
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I'm attempting the following code to calculate how many quarters, dimes, nickels and pennies a user should get as change, and display them in four labels, when buying an item from a machine. The user inserts the amount paid and the cost of the item in two textboxes.My code is as follows:
Code:
Private Sub btnCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalc.Click
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I can't understand how it happen. But this first code is working but the second code it did not work (but it is 100 % same code I just change it to the table name). I can't display the data result into DATAVIEW in post # 2, in post # 1 work perfect..
The database are:
Local: access 2003
Server: MySQL server
Post # 1 - Working
Private Sub TSRUpload()
If (Me.Ping.Send("PH180", 500).Status) = Net.NetworkInformation.IPStatus.Success Then
Dim ds As DataSet = New DataSet()
Dim tblLocal As New DataTable
Dim tblServer As New DataTable
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I am building an application that will run through various tasks like database backup, zipping some other files and so on.I have the progress bar figured out for each individual task and I have all my tasks working.I am trying to build an interface to display to the user to show them the progress of the entire run.I was thinking like a list box or other object where I could put a green checkbox image or red x image as each tasks runs and is a success or failure.
View 1 Repliesi'm working with a sql (2005) database and using visual studio 2010. I've created a system where one of the forms is a find/search form. A user can enter in for example, a customerID and once they click on "find/search" the customerID will be searched in the database and if found, all relevant information about the customer will be retrieved and displayed in another form (find/search results page). I realise that this can be done using an SQL statement like follows
searchStr = "SELECT * FROM Customer WHERE CustomerID LIKE CIDTextBox.Text%"
What i'm unsure about is how to execute this SQL statement once the "find/search" button has been clicked and how to display the founded results in another form.
So I have coded connection to database and query but when I push button nothing happens. So my question is how can I fix that Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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I have to write a program that allows a user to input DVD info such as DVD Name, Year produced, Running Time, and Rating. The user then clicks a menu item "New" to save that info to a file. Then the next time the user inputs new DVD info it has to append the new data to the same file. (I got this far and everything is working writing and appending data)Next the year has to be able to search by DVD Video name and it has to print the info in the text boxes on the form, if not found then a messagebox should say not found. When I use the sub procedure that I have created to search the record it always comes back as record not found although the record in in the file.
Option Strict On
Imports System.IO
Public Class Form1
'Class level variables
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I am having trouble displaying my results from a temperature conversion program. I am sure it is something simple that I have overlooked. Here is the code.
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The assignment called for a VB.Net (not web based) program that would accept user input for the loan amount, interest rate, and term of loan, and display the monthly payment of the loan then list the loan balance and interest paid over the term of the loan. the list will be longer than the screen so use loops to display a partial list, hesitate, and then display more of the list. So, I did exactly that and the program works fine. However, after submitting this program for grading, The instructor for the class tells me, "One thing you should work on is not using a timer to pause.
You should not use a scroll bar either." He says I should work on loading the results into an array or use a loop with a counter that can be used to display a given number of results with a more results button for displaying more (but without a scroll bar?). Like I said, this program works fine and I am not asking anyone for any specific code (some sort of example would be great but not necessary) What I am asking for is an explanation of how I would go about loading results into an array to be used for displaying just partial results at a time in some way other than I used here: [Code]
I have a listbox displaying sql results in a loop. Let's say I want to select one of those results and click a delete button. I have the button and box setup displaying the results just fine, I just do not have the functionality. How would I do that?
View 18 RepliesI had done this by using the query builder (in VS Studio) but soon found out thay I gain no points by doing it this way as I am not using any code. I have tried to adapt the code I had to insert data into my database, just changing the SQL sintaxa and some other bits, but it is not working yet. Well, it gives results, but I think it is still geting the results from the query I had built using the query builder. Here is the code I've got so far:
Public Class Form2
Private Sub btn_search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_search.Click
Dim str_search As String = txt_search.Text
Dim str_dob As String = txt_dob.Text
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I am currently having a headache on how to solve this problem that i am facing.here is the situation:I have a combobox and a list box on the main form. The combobox will get the data from the ms access database.In the database, i have the details of a person's IC, Name and DOB say for eg on one entry I have D215311523C,SHAWN,13/04/1987
So now, my combobox on form load will show the list of dates in the database to allow the user to search base on the date itself by clicking on the selected date. So when the user clicks on the particular date say 13/04/1987, people in the database whose birthday is 13/04/1987 will be shown on the listbox.Meaning to say if i have 3 entries whose dates are the same 13/04/1987, 3 entries will appear. If there is only two entry, then two results will be shown.
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I am writing a VB.NET Windows Application which takes numeric user-input and performs a complicated calculation, yielding many numeric output variables. Previously, I wrote a similar program in VB6, which output the results to a rich text box using fixed-width font in order to organize data in columns and used asterisks to delineate table areas and section borders. I then used the printer object for printing the output. This method was very archaic and difficult to modify when changes were necessary.
View 5 Replies655211, Male, David Graham, 1992, 20, 0411221122I have got the code which displays all the info, however i need to modify it to display only male or females
Dim fileReader As String
fileReader = My.Computer.FileSystem.ReadAllText("C:data.txt")
Label1.Text = (fileReader)
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I am trying to make a list, separated by a comma, of entries from a single column in a SQL database. I have been spending the last several days searching for a way to do this, but every thing I found either didn't work, or wasn't exactly what I was looking for.
The query will pull all the email address that are not null. What I need to know is how to take the result of that query and make it look like this:
email0@address.com, email1@address.com, email2@address.com, etc, etc, ...
I feel like I should know this, but for the life of me, I can't remember nor can I find it in any of the textbooks I have.
I am using Visual Basic 2010 and SQL Server 2005. I also have access to Visual Basic 2005 if needed.
I have a form that allows users to select file and then it reads the contents, parses the data and then executes a sql insert statement to add it to a database. What I am having issues with is showing real-time results. Currently, I have the import operation take place on the import form within the OnLoad event. The problem with this is it only shows the final results instead of the results real-time. Is there anyway to do this without creating a seperate thread and delegates?
View 1 RepliesHow can I make this program not to give me the results for the quit command input of -999 but rather just to quit without the results?
Sub Main()
Dim TempIncelsius As Double
Dim TempInput As Double
Dim Formula As Double
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i mean for e.g., numbers are between 1 and 100 .i want to show messagebox for each number as text for example "One" for 1.
View 1 RepliesI had posted this question before but didn't get the right answer -here's my code again with the if condition.
Dim provider As CultureInfo = CultureInfo.InvariantCulture
Dim a1 As DateTime = Nothing
If date1.selectedvalue isnot nothing Then
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I have a problem. I have been programming an activation type of security protection for my software but i ran into problems when i try to generate an alphanumeric key with conditions. i cant seem to be able to make the keys to be valid with the condition. Basically i can get the 25 keys but all of them seem to be returning 1 (ones) instead of 0 (zero which what i want. below is my sample code may be someone can tell me what i am doing
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I have the following code which gives me an error at run time. The problem is when TxtSearch.Text - is not an integer a message box should be prompted saying- Only a numeric value is allowed in this field, otherwise continue with the sub.
Private Sub ButtonSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonSearch.Click
Dim query As String
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The error I receive is showing ''saved_prac = cmd.ExecuteScalar()''..
First it brings the Message box - Only a numeric value is allowed in this field. When I OK it, then it brings another message box "error converting data type varchar to numeric". When you click OK the application crashes...
What is the correct syntax to go to the next sequence in a loop if certain conditions are met bypassing the contents.
I am using goto and inserting a line number which is probably not the best way.
I.E. My syntax:
For i = 0 to 100
If i = myvariable goto 100
Functions to be performed
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When I am click a button every time adding +1 in a textbox but I want to give condition that it will add until the desite is 8 I am using the following code
If e.KeyCode = Keys.Down Then
textbox1.text = Val(textbox1.tex)+ 1
End If
I'm trying to read data from database.
If objReader.Read = True Then
If objReader("cell") IsNot DBNull.Value Then
Me.txtContact.Text = Trim(objReader("cell"))
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Problem is, no data displays if cell is empty.
my problem is that i want to put if condition on textbox for example i want if key board keypress on textbox then enter no in textbox
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I use a worker thread to do the procedure of query and fill the datasetAnd I use 3rd party component called DevExpress XtraGrid: GridControl to view the query outputI don't forget to use invoke and delegate to set the GridControl.datasourceOn Timer.Tick(), the thread is started and the procedure is called user has scrolled down the GridControl, even only one scroll value instead,and then the Timer.Tick() fired, I gottwo errors randomly. Mostly aNullReferenceException error and eventually anInvalidOperationException error
************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at DevExpress.XtraGrid.Views.Grid.ViewInfo.GridViewInfo.UpdateCellAppearance(GridCellInfo
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Scenario: I need to create a report for the auditors for an ASP.Net application. I have a program that parses the XML of the web.config files in a directory for the authorization tag and creates a report providing which users have access to which folder in the site structure. The report is shown below.
UserName, Firstname, LastName, Directory, Roles, Access,
LastLoginDate
Problem: As you can see from the report some directories (the middle column with GISMO in it) show up twice, with both allow and deny for a user. I am wondering if there is a way to group the results in such a way that if there is a row that has allow for a directory then the deny's are not shown but otherwise they are.
Alternatively if this can be manipulated in VB.net/C# that is also an option. It comes back there and is pumped into an Excel spreadsheet.Edit: I should have explained better. I still need the deny rows to show if the user isn't allowed in the directory. But if they are allowed then there is no point showing the deny rows.
I am developing an application to my official use. In which I have one combo box for selecting the customerName.When I select the custName from the combobox I want to retrieve data from a particular field of a table and sum it within a selected date value. i.e: When the user selects a custName from the combobox the field within the date value should be summed up and grouped by custName. I think it is possible but I dont know how it is to be done.
View 10 RepliesI think im going mad but can some show me what im missing, it must be some stupidly simple i just cant see the wood for the trees.BOTH side of this if then else statement are being executed?
Ive tried commenting out the true side and moving the condition to a seperate variable with the same result. However if i explicitly set the condition to 1=0 or 1=1 then the if then statement is operating as i would expect. i.e. only executing one side of the equation...
The only time ive seen this sort of thing is when the compiler has crashed and is no longer compiling (without visible indication that its not) but ive restarted studio with the same results, ive cleaned the solution, built and rebuilt with no change?
Dim dset As DataSet = New DataSet
If (CboCustomers.SelectedValue IsNot Nothing) AndAlso (CboCustomers.SelectedValue <> "") Then
Dim Sql As String = "Select sal.SalesOrderNo As SalesOrder,cus.CustomerName,has.SerialNo,
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