I am trying to create a form that adds two text boxes together, I have achieved this however when running the program if you forget to enter numbers in both boxes the program crashes! I don't want to display an error message I just want the program to ignore empty boxes.
View 10 RepliesI want to take the values from textboxes on a windows form and then update the values in the sql server database...I want to update only those fields for which a value has been entered by the user and leave the database fields as it is (no change or updation) for which the textboxes are left empty by the user.....I opted for sql command and then i couldn't find out How can I generate the query dynamically for such a situation??? Like I intialize the string by str= " Update Bookings set " and then how i can alter it by considering the textbox values that have been changed....I couldn't find the way...I need shortest and optimized code for this situation....
View 5 RepliesI have a large form that reuses several elements, so I decided to create a usercontrol with some common fields. The problem is when the form is filled out by a user and submitted, how do I reference those values so I can input them to my database???
Example:
Using Conn As New SqlConnection(connect)
Using Cmd As New SqlCommand(SQL, Conn)
Cmd.Parameters.AddWithValue("@Acct_Company", txtPartner.Text)
Cmd.Parameters.AddWithValue("@Acct_AccountNum", txtPartnerAccount.Text)
So, above two Cmd lines are for normally inserted textboxes in my form, but what would the line look like to reference any usercontrol form fields?
I want to take the values from textboxes on a windows form and then update the values in the sql server database...I want to update only those fields for which a value has been entered by the user and leave the fields for which the textboxes are left empty by the user.....How can I generate the query dynamically for such a situation???
Edit:
I haven't yet coded for the update option...Here is my insertion code and i wanted to implement the update feature the same way just couldn't figure out how i can generate the query dynamically....It's a Booking System application
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I am using vb.net 2010. I have a datagridview whose data source is a data table. I dynamically add rows to the data table.
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After adding the new row, m_table is correct. However, DVGCusClient not only adds this row, but also adds two additional blank rows at the bottom. I have no idea where these two blank rows come from. Why I use above code is as follows: Use a data grid view to display data. When a user clicks a row, another form is opened which allows user to search/input some data.When the user closes the form, all data is saved to a data table and shown on the data grid view.
So I am able to get the comboBox populated with the proper list of "clientLocations".
However they all have a valueMember of 0; thus the issue at hand is properly assigning the value of the comboBox items to the database column (which is returned in the dataset) rather than just the name.
Private Sub updateClientLocationComboBox()
'clear list
comboBox_clientLocations_deviceList.Items.Clear()
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create form with 5 column system of textboxes?
View 1 RepliesI have 81 text boxes on a form and would like to create a text array in code that will equate to these boxes on the form. Once I've assigned each text box from the form to the array entry, I'd just like to work with the array - then have the actual text boxes on the form reflect the changes made to the array.
View 4 RepliesHow do you create a separate file that records and adds the favorites to so you dont lose them ect
View 4 RepliesI am trying to create an application that adds the contents of a till to a database. (Does this on two forms into two different sets of db columns) and can pull that back up at a later stage. At the moment, I'm stuck at the first section?
BODda.Update(BODds, "Data")
Is where I get an SQL error stating:Syntax error in INSERT INTO statement.I have not been able to find a way to insert via SQL?
I have to create program that adds the whole numbers from 1 to 1000 and displays the sum in the label. Create a variation of this program that allows the user to specify any starting whole number and any ending whole number (10,000 or lower) and then adds all the whole numbers in that range. Allow for the possibility that a user may start with a high number and end with a low number. Format the label so that commas are displayed and there are no decimal places showing. I need help with the codes.
View 5 RepliesI have a Save() function as shown below;
Code:
Public Function Save() As Boolean
Dim valid As Boolean = True
Dim Message As String = String.Empty
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What I want to do is when The toolbarbutton1 is clicked it checks for the
Save () - if txtprojend.Text = "" then it displays the message. So far, it does that but then it closes the form. I don't want it to close the form unless the user adds text in txtprojend, as it is a mandatory field.
I am an intern at a company doing Drawing Tools for their program. My supervisor is currently having me just make a user control that draws a line and adds transparency over a form. (I started this internship very early, so my knowledge is very limited compared to what it should be for a standard intern)
This is what I have so far:
Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
If MyBG Is Nothing Then
MyBG = New Bitmap(Me.Width, Me.Height)
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I have a Form with 4 Textboxes. The Textboxes are multiline. To write the contents of the 4 textboxes, I did the following.
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How do I read to or populate the Textboxes using StreamReader or StringReader or other means?
I try to calculate some values that I have stored in textboxes..I made 2 variables as double and tried theese two lines of code.
View 2 RepliesIm just wondering if some one can take a look at my insert statement, as is not working,
Im trying to add values to SQL from 4 textboxes. Public Sub Insert(ByVal textbox3, ByVal textbox4, ByVal textbox5, ByVal textbox6)
Dim conn As New SqlConnection
Dim comm As New SqlCommand
conn = New SqlConnection("Server=Scott-VaioSQLSERVER;Database=Testing;Trusted_Connection=True;")
conn.Open()
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how to INSERT FROM in vb.net if you are getting values from textboxes?
View 2 Repliesi have a textbox where i get numbers by looping...i get 1,2,3,4,12,345,32 and 67..
but i get only 67 in textbox..i want to add all the numbers and display the result at the end...
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how can i add after each loop.
Iam trying to Check Values Of 2 textboxex .. n then Print A certain Amount.
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i am having trouble with the inserting of new values though the textboxes. it gives me the error Syntax error in INSERT INTO statement., OLE DBEXCEPTION was unhandled at da.Update(ds,[code]
View 1 RepliesI have 10 text boxes and I'm trying to create an array to store the values entered by the user, I then need to add the totals of all of them, get the average, highest and smallest of all the 10 values entered by the user?
Public Class frmNumberAnalysis
Dim tbArray(9) As TextBox
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
[code].....
I started editing an existing code (basicaly to learn vb) without any real previou experience. Well let's get to the point; I have a form that gathers data from db ordering by user ID (on click count). I have one DataGridView with a list of user, some have data in db, some have not. I came so far that if I CLICK on a user that have data, all data is dissplayed in 6 dinamyc textboxes. If user has no data inly first (emty) row with 6 dinamyc textboxes is created.
Then I have a button that simultaneously adds a row of dinamyc textboxes bellow and multiplyies textbox04 (name is clickcount & 4) and textbox05 and displays the result in textbox06. I want to add a messagebox that shows if textbox04 & 05 are empty and in that case exits sub. Of course if they are not empty, their sum should be multiplyed in textbox06 (on 2 decimal places exact) Here is my code so far:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Reset warnings
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I have 2 textboxes where the values are filled with this code(the data is collected from 2 different
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When I now tries to update the data in the box743 i get an error. Who says that I can not convert the strng to double.I use the tableadapter to update the database and both box498 and box518 updates without problems.But when I try to upgrade the 743 box I get the error.
if i have 10 textboxes on my form with numbers inside 5 of them have the number "0" other 5 lets say 100 50 40 30 10 i need to get the smallest value but not the "0".
View 2 RepliesI have textboxes which is placed inside accordian (ajax control).In pageload event i have written the code to load values in textboxes. But onload event one error is coming as object not set to instance of a object. Values are not coming in textboxes.
Then i tried to initialize controls in textboxes .Then the error cleared. But
Values are not coming in textboxes. What may be the reason for this?
If i have multiple textboxes with the same Id and name in a form, how to fetch there values separately in vb.net? in javascript iv used fetched them like this
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if textbox1.text =S1, S2 then on button click event the S1 and S2 column value of Table in MSSql2005 database will be updated with the value "b" where date=1/3/2012
But the update is not working...
My MSSQL2005 Database structure :
id date S1 S2 S3
1 1/3/2012 b b NULL
i have a question on how to add two values of placeholder on different forms. in the forms i put a placeholder for "correct answer" and "wrong answer" so one of this placeholder will have a value of integer. how can i add a value on the first form to the other placeholder of the other form.
View 5 RepliesI am currently building a mortgage application and currently have two forms, the way the system works so far is the user selects an option from a series of radio buttons whilst a score is kept based on the options chosen, this is then displayed in a text box to the user, on the second form there are more choices, and a textbox to display the final score, what I can't figure out is how to get the value from form one to the textbox on form two when the user clicks next on form1 to get to form 2.
View 3 RepliesHow do i get data from a database and put it in to multiple text boxes?Basically i have abilling form with; name, address, etc.But i have a 'retrieve' function underneath which allows a name and post code to be entered and then the information above is automatically filled in if the name and post code exists. At the moment i just setup a connection with the variables. not sure how to do the rest
objCommand.Connection = objConnect
objCommand.CommandType = Data.CommandType.Text
objCommand.CommandText = "SELECT CustomerName FROM Customer WHERE CustomerName = @CustomerName AND PostCode = @PostCode"
[code]....