Querying A Single Column And Displaying All Results In A Single Textbox?
Sep 5, 2010
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:
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.
I have a gridview that is bound to a datasource on a Windows Form (VB.NET). The grid displays a list of "certifications", and each "certification" can be associated with many languages. So in the grid, I'd like to display "languages" as a column, and display a comma delimited list of the language names for each "certification".
In the "certification" class, one of the properties is a list of "language" objects, and each "language" has an ID (guid), name (string), and value (integer).
So in the datasource, I have the list of "languages", but I can't figure out how to display them in a column on the grid. The gridview won't let me add the language list property as a column.
So is the ONLY way to add a new property on the "certification" class, which returns a string that contains the comma delimited list, and show THAT on the grid? Or is there a way to display that list of "languages"?
the code display 2 colunms in one combo box from a table. i have table with 2 columns account_type and account_name. the account_type is an abbreviation(codes) which would be stored in a new table when selected. I want the code when the combo is click, would display the code-account_type and account_name in the same combo box.
Private Sub cboAccount_type_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboAccount_type.SelectedIndexChanged Dim cn As New SqlConnection(ConnectionString) Dim query As String = "Select Concat(Account_type, ' - ', Account_Name) As AccountDesc, Account_type from Accounts"
I have used a single picture box and I want it to display many pictures when I run it, whereby I cant navigate through it by clicking next or back. I used some codes, they had no error but they weren't able to display my pictures during run time.
Dim find_id = From p In dbContext.Residents _ Where p.person_name = occupant _ Select p
I then pull the first returned ID like so:
Dim building_id As String = find_building_id.FirstOrDefault.id
This works fine, except with the person has a ' in their last name, like M'arta. In this case I get a NullReferenceException.
Okay, the problem appears to be that when I am capturing the name initially from a GridView it is inserting into the value a #39 instead of ' and then LINQ is keeping things correct, so I end up with a non-match since it is attempting to match:
Say I have a code with 3 methods that do some pretty intensive work. Would executing these methods on 3 seperate threads be faster then executing them one after the other on a single core cpu? And what if it's a dual core or HT?
I use SqlParameters when executing database statements. I know that I can replace a single quote with two single quotes... but in the past SqlParameters took care of this for me. I have two projects.. in one, the SqlParameter does this and it handles single quotes fine, in another, it does not and I'm at a loss why (I even copied and pasted the code):
Here's the setup: I've created a class that represents a temperature and humidity monitor. This class handles all of its own operations (connects to the monitors via TCP, reads the temperature and humidity values at set intervals, logs the data, sends email notifications, etc.). I've got a single Windows form that has two textboxes for displaying the values of temp and humidity. When I start the application, I simply instantiate an object of this class and let it do its thing. Every five minutes, it opens up a socket connection, pulls in the data I want, sets the Temp and Humidity properties of the object to the values it obtained, and fires a DataUpdate event which is captured in an event handler in the Windows form.
When this event occurs, the textboxes on the form are updated with the values from the Temp and Humidity properties of the object. Works like a champ. However, I've been playing around with multithreading. Since a disconnected device will cause my entire application to block when it tries to connect, I decided to place the socket connection/data acquisition method into a separate thread. If it can't find the device, no big deal -- at least it doesn't lock up my UI. This thread is instantiated and started inside the object code, NOT the Windows form.
Here's my question, the socket connection/data acquisition method is run inside this new thread and sets the properties of the object when it's done. So, why do I get an illegal cross-thread exception on my Windows form, now, when I try to update the textboxes? It seems to me that the instance of the monitor class is running in the same thread as the Windows form. I only employ a separate thread when I want to run the socket connection/data acquisition method. Is my understanding flawed? I can display the updated property values in message boxes that are called from the Windows form. I just can't manipulate the textboxes.
I am developing a form which needed to display 2 values from a combo . I have table Account with these fields Account_type, Account_name in this table. Even though I am saving only the Account_type in to a new table but when selecting from the combo, I want the account_name also display since the account_type is a code so that user would understand the mening of the acount_type. vb.net code that would display both the code and the account name to this. I used data binding to do this, it also displayed only the code.
somehow combine the results of separate Fill queries on a single dataset?Basically, I'm trying to implement a 'Filter' function, whereby, the user can filter the records in a DataSet according to specific criteria.
I am trying to update a row or a single cell in ms access through vb.net. But when i update the text box named NRIC, say for example i want to update "s4522147B" to "tr4521856C" and mean while leaving the other fields the same.
But the thing is when i make the changes in nric.text (textbox), the dataset actually updates the whole column in the table instead of the selected textbox.
i want to know is it possible to bind my all crystal reports to a single reportviewer, somewhat in tabbed view or treevie. If tabbed then visible through navigation button.
Ok, the basic situation: Due to a few mixed up starts, a project ends up with not one, but three separate databases, each containing a portion of the overall project data. All three databases are the same, it's just that, say 10% of the project was run into the first, then a new DB was made due to a code update and 15% of the project was run into the new one, then another code change required another new database for the rest of the project. Again, the pertinent tables are all exactly the same across all three databases.
Now, assume I wanted to take all three of those databases - bearing in mind that they can't just be compiled into a single databases due to Primary Key issues and so on - and run a single query that would look through all three of them, select a given set of data from each, then compile those three sets into one single result and return it to the reporting page I'm working on.
datagrid.datasource = dataset.tables(0) datagrid.datamember = "Column1" 'Where this is the name of the column
This would show me just that column in the grid regardless of the number of columns in the dataset.
In VB.NET 2008 I do: datagridview1.datasource = dataset.tables(0)
I see all the columns.I then add:
datagridview1.datamember = "Column1" 'Where Column1 is the column name
I then have an empty grid.How does one get only a single column to show in the grid from a multi-column data source? I am using internal code to populate the datasets and tables.
So this doesn't seem like it should be that difficult, but apparently I'm overlooking something..? I have a datatable that has 4 columns. I want to output only the second column from the datatable. Here's what I've got so far:
Dim dt As New DataTable ** Datatable is set here ** Dim row As DataRow[code]....
Using VB.NET, what is the most concise way to convert a single column of a DataTable to a CSV? The values are integers, so I don't need to worry about character escaping or encoding.
I am filling datagridview with data from SQL server 2008 R2. one column is date which is stored in the data base as yyyy-mm-dd and when i retrieve it displays in the same format. I want to change the display to dd-MMM-yyyy.
Try Connect_Design_Document_Record() Dim cmdDrawing As New OleDbCommand("SELECT DRAWING_NO, DRAWING_DESCRIPTION, DRAWN_DATE, REVISION_NO" & _
I have a variable defined as Object(,) that was read in from excel. Without getting into a for/next, is there a simple way to read the c-th column or r-th rown from that array into a single variable?
I am working on DataEntry Forms in VB.NET There are two controls are having in a present window. One is Combobox and one is Textbox. Combobox values are Mobile, FAX, E-mail. By the mistake some one enter the values like , In the combobox-E-mail and in the Textbox-9987453434. Finally these are saved on the Database. But i want to Re Enter the values.
For this i was selected in the Combobox-Mobile and in the Textbox-9987453434. These are the right values i want to save on the database.
But here the problem is that Phone number column(Textbox) is Indexed. (Unique) or No Duplicates in the database. Now i want to update only one column which is coming from Combobox in the database.
How you might construct an array like the following: one column or entry would be a single integer, like 0, 1, 2, 3, 4... - i need this as an index of each one's position in the list the second would be 0 or 1, or true or false the third would itself be a list of integers 0,4,5,2,7,2,5,2...
So all together one entry would be {0; 0; 0,4,5,2,7,2,5,2} while the next might be {1; 0; 6,8,2,5,2,3}
I'm having a terrible time wrapping my head around this. It's mostly the third column which is actually a list in itself, that is giving me trouble
I have a few problems i need to solve. Firstly, I am looking for a piece of code i can use to display a picture from a bank of pictures. It will work on the basis of generating a random number and loading a picture that corresponds to that number.
i.e. Dim RandNumber As Integer Dim RandClass As New Random RandNumber = RandClass.next(1, 10) If RandNumber = 1 Then Picturebox1.image = picture1
[Code]...
Secondly, can I then use subsequent picture boxes to display pictures from the same bank of images, without displaying the same image? Finally, I then need to be able to click the picture or a button beneath the picture to select it as an answer to a question and then the whole process starts again.
Alright I have my assignment to the bottom, and my code so far in CODE mark up.I'm trying to get a value in a textbox assigned to a variable (Price) add to a variable (Subtotal), clear out the textbox and loop around. I looked for hours in my book and google and couldn't find m
Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
I'm trying to create a "LOTTO" number picker, but I don't want to have more than one TextBox. And I also don't want duplicates in that single textbox. The program randomly picks six numbers from 1 to 30 (Sorry I don't have the code at the moment).
My code runs fine, but I keep getting duplicates in the textbox. (I'll update as soon I have the code.)
