Having a little issue with my boolean statement. It is not changing the value to true after you click it. Its a basic function just not working correctly and Im pretty stumped on why. I mean its a simple yes or no concept. The button is on or off is the basic concept.
Private Sub btn_Backhoe_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Backhoe.Click
Dim InUse As Boolean
'Switch On/Off[code].......
In my DataGridView, I have several columns with check boxes that indicate whether the part has been bought or not. I want to add the summation of each column though to know how many of each parts have been bought by a single company. I have the count code working partially but I cannot get the correct number at all. Here is the code:
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how to store boolean values in ms access or sql server
View 1 RepliesI have code like the following:
Dim Flag as Boolean
Flag = Function1ReturnValue
Flag = Function2ReturnValue
Flag = Function3ReturnValue
Now ideally 'Flag' should only have a true value if all three of the functions returned 'True', but as it stands now it won't do that. There needs to be an 'and' or an 'or' or an '&' or something like that, but I'm confused as to what needs to be.
I'm pretty new to MVC and the Entity Framework, but I'm sure this should be straight forward. I've got a class with a boolean "Active" flag. I then have a function that returns the results by date descending. All I want to do is ensure that only active records are returned. Should be simple, but it fails with the following error:
Error 13 Overload resolution failed because no accessible 'Where' can be called with these arguments: Extension method 'Public Function Where(predicate As System.Func(Of Review, Integer, Boolean)) As System.Collections.Generic.IEnumerable(Of Review)' defined in 'System.Linq.Enumerable': Value of type 'Boolean' cannot be converted to 'System.Func(Of PowellCasting.Models.Review, Integer, Boolean)'.
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From what I read it is a good convention to name a method that returns a boolean value with the prefix of "is" or "has". So in keeping with this convention I am trying to name a method in my program with this prefix but I am running Specifically I have a class called Day. It is a simple class with a few data members and one method that returns a boolean value of true or false. The name of the boolean variable is isSpecialDay. This class has a method called isSpecialDay which takes the date of the day, applies some criteria to the date and then sets the variable isSpecialDay to true or false. My problem is that the boolean variable is named isSpecialDay and so it the method. What should I do?
Public Class Day
Private TheDate as String
Private DayName as String
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i have an array of booleans whose current boolean values I want to preserve but add additional length to the array? How can I achieve that? My code looks like this:
Dim Array() As Boolean
Dim ArrayInterimShort() As Boolean
ReDim Array(119)
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After Filling a DataTable in GridView's DataSource . A column with check box Type appears but it created as read only column and I can't enable it or make it editable... even i tried .readonly = false and still can't be edited
View 1 RepliesHave read most of the null value posts here, and I have managed to get things working as far as a "next record" button for my database application form (there's some awesome advice on this forum!). I have just one question, though. How do you manage saving of blank text box values from a form? I am using JET, but when I try to save an updated file that has a null value, it is not letting me. I got around it by forcing the text boxes with null values to contain " ", but obviously this is not the bext solution!
View 1 RepliesIm creating an application that allows me to enter a product with a cost. I want all the costs to be saved in an array and then calculate the total cost and display it in a label. I looked for hours in my textbook and cant seem to get this part.
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I have a form in an application that I'm building and in it I have a datagridview that when a user clicks a checkbox on a line in the datagridview and "submits" the data, then the form will insert all of the data on that line (along with the code "Holiday") into a database. Currently if I click in the checkbox on any line other than the first line and put a line break on the "Try" statement, and then fire the submit_onclick event, I'm never reaching that break point but if I click on the checkbox on the first line and submit that data, that works and it behaves at I stated above. Here is the code as it stands currently:
Code:
Private Sub holidaysaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles holidaysaveButton.Click
For Each dr As DataGridViewRow In DataGridView1.Rows
[Code....
My windows form as a bunch of textboxes on it that basically let the user put in different positions/forces that a test cycle then uses. I am trying to let the user save their profile settings/open the settings so they don't have to input the same values every time they want to run the same test. Here is my code so far. basically, when i save my csv file, and open it, all 6 textbox values are plopped in the first textbox instead of being distributed to their original boxes. I just read about a "split" function
code
Private Sub SaveProfileToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveProfileToolStripMenuItem.Click
SaveProfileDialog.ShowDialog()
Dim sw As StreamWriter
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I have A combo box with 5 values in: How would i save all 5 of those values to my file?sw.WriteLine(CustomerIDTextBox.Text + ":" + CustomerFirstNameTextBox.Text + ":" + what????? Once these values are saved how would i go about retreiving them from the file and displaying them back into the Combo box?
View 3 RepliesWe have a listbox in our MVC View and the user has the ability to highlight multiple values. I'd like to be able to save those selected values(if possible?) as a comma delimited cell value in our '08 SQL Database.
The image below shows what I am attempting to explain. Note the selection in the LISTBOX
This is where we save the passed in values from the Positionnumber DDL (Listbox w/ mulitple highlights).
> <HttpPost()>
> Function Edit(wsmonitor As WSMonitor, ByVal vbpositionnumberDDL As Integer, ByVal PassedCounty As Integer, ByVal
> MonitorTypeDDL As String) As ActionResult
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I have 50 checkboxes for 50 american states. The user can choose all 50 or only 1( so basically any number he wants). Based on his choice, I want to insert or update the table in sql server 2008. e.g- Color = blue and chk1=check, chk2= check and chk3 = check (chk = checkbox).
Now the user wants to ad 10 more states to this or remove these 3 and add 5 more. so u basically get the idea. the table in database looks like this -ID Color State_id
There is a table called states, so stateid shall come from there. so how do i do a loop insert or update in vb.net?
i have 50 checkboxes for 50 american states. The user can choose all 50 or only 1( so basically any number he wants). Based on his choice, I want to insert or update the table in sql server 2008. e.g-Color = blue and chk1=check, chk2= check and chk3 = check (chk = checkbox).now the user wants to ad 10 more states to this or remove these 3 and add 5 more. so u basically get the idea.the table in database looks like this -ID Color State_id there is a table called states, so stateid shall come from there. so how do i do a loop insert or update in vb.net?
View 5 RepliesI have used the following code to update the app.config file. The code works fine and didnt shown any exceptions, but values are not storing to app.config ?
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I have a form in an application that I'm building and in it I have a datagridview that when a user clicks a checkbox on a line in the datagridview and "submits" the data, then the form will insert all of the data on that line (along with the code "Holiday") into a database. Currently if I click in the checkbox on any line other than the first line and put a line break on the "Try" statement, and then fire the submit_onclick event, I'm never reaching that break point but if I click on the checkbox on the first line and submit that data, that works and it behaves at I stated above. Here is the code as it stands currently:
[Code].....
I'm creating a game using vb.net and whenever the user inputs something to my program it displays the time and the time displayed until the user inputs something again the the time changes. I have my program display each individual timestamp but I would like to know if I would be able to save the values and all display at the end of my game in a new form.
The code I have is the following:
(in timer1=tmrReadInputs):
For I = 0 To 3
If (Convert.ToInt32(DataValue) And CInt((2 ^ I))) <> 0 Then
lblBitVal(I).Text = "1"
Else
lblBitVal(I).Text = "0"
TextBox1.Text = Trim(Format(Now, "hh:mm:ss tt"))
End If
Next I
tmrReadInputs.Start()
So when the value changes from 1 to 0, the textbox displays the time. How can I save the different time stamp values? I heard StreamWriter can work but I keep trying that and it doesn't work
I've got a problem saving asci Values to File as Byte. I must save hex values to file, for this case i used the following line: fs.WriteByte(&H2D) This works fine, but i need to do this autmaticly. My Sourcestring is 2995030. Tried to do something like &H(Hex(str)), but this failed.
View 8 RepliesBasically I have a form which is used for a report, when completed it is then mailed to various mailboxes. I would like the option that if the user cannot complete the form, they can save it & reload the values into the form to use later.Some of the boxes will have quite a lot of text, so using the registry is not an option. I have looked at My.Settings but think this is for application settings not user input such as a lot of text - but I could be wrong.I've looked at freefile & got it to work with text boxes saving to a .dat file, but had a problem in that text appeared in the wrong text boxes so I assume the order was different in the load to what it was in the save?
View 2 RepliesI have a simple windows form application (I'm working in Visual Basic Express 2008).
There are some forms that have simple text boxes. When somebody wants to edit something in this boxes he pushes edit button and then they are enabled. I insert some text and when I save this text is saved for good.
When I reopen the application this text is there like I want it to be. Just for information, this text is always the same in one text box, until I change it (me or some other user) - so I think there is no need for databases. For my needs this is ok because I don't need to change this data often. This is code in Form load event (for calling back the data)
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I am using VB2008 now, couple of simple questions.
1) Is there some way to limit what my user puts in their textbox to numbers only? Or is there some way to check afterwards that the string only contains numbers and delete it if it contains anything else?
2) How to open a file, save the values of 5 text boxes into the file and then close the file?
I have added a new column to my bound datagrid table using sql server management. Added a new textbox to my form and using databinding, bound the textbox to the new column. Running my app I can enter text in the new textbox and if I save or move from the current row the text shows in the grid. But...after refreshing the grid or restarting the application, the text is no longer there.
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i want to know how can i save data from datagrildview to XMl file with writexml method or any other method
here ds is my dataset and after updating datagrildview i want to update ds and save/update XML file
I have created a small program that performs various calculations with data entered by the user. I need to be able to save the entered values and the results on the system running the program and be able to open it at anytime in the future and have the values and results displayed in the correct text boxes. I am currently reading up on some tutorials but I was just curious as to how I can send all my data in Visual Basic to my database in Microsoft Access?
View 4 RepliesThe problem is this: I have two forms. One form and the other form do mathematical calculations. I want to save the values that the user inputs, so when the user quits the program and then starts it up again the values are still there. But when I open up the program, start typing in values, then calculate them, hit quit. Try to open up the program again, its giving me a message that the input file is invalid. When I click ok, the program doesn't crash, continues. But the values are not there at all. The other form I put exactly the same code, just changed the variables and it doesn't want to save the values at all! I wrote this code for saving and loading the values:
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I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
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I ran some code through an automatic translator for C# to VB, and it translated some code like this:Public Property Title As [String]How is this different to Public Property Title As String
View 3 RepliesMySQL databases exists for saving values as strings (text only). Is there any way that i could store files with the same speed as a mysql command ? I know that it depends on the file size but lets say that the file is "Avatar.jpg" 50KB... I ve tried FTP but this is not what im looking for. e.g. You want your users been able to upload a file like the [Add This Attachment] button does in dreamincode.net and you dont have any background on PHP/HTML/Javascript/ASP.NET just VB.NET and the basics of MySQL plus you dont want to use it for a website. How do you accomplish this? Something silly that ive tried was opening an image as text then update the mysql server with that text but it didnt work backwards after i wrote the text on the file and oppened it ...it said that the image was corrupted.
View 7 Replies