[2008] Query Database Using SQL And Displaying Results In Datagridview?
Sep 25, 2009
I 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
[code]....
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Mar 13, 2009
I am making a project in VB 2008 that has a Form (form1) that allows me to add new records to a database, and another Form (form2) that allows me to search for records in a database. I have done Form1 already, but my problem arrives in Form2 where I have to query the database. This form consists of 1 textbox (txt_search.text), 1 button (btn_search) and 1 datagridview (datagridview1). The name of my database is db_extras_test2003.mdb and the table I want to search records from is tbl_contacts.
I know +/- the SQL sintax to query the database (SELECT * FROM tablename WHERE columnname = (here i dont know if i put the variable name i have set for the txtbox, or the textbox itself)).I want this in a way that I (or other users) type in the textbox, hit the Search button and the results are shown in the datagridview (i can show the results in another way if it is better to do so).I have done the connection to the database already. The code I have so far is the following, but it doesnt work
[Code]...
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Apr 9, 2012
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
[Code]...
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Aug 24, 2009
Well, just struggeling to decice on which would suit my situation best. I am developing a simple app to show a log of radio messages. Should I display these in a listview or in a datagridview? What is the actual difference?
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Nov 23, 2010
I need a clarification about using datagridview and query statement. i created a sql express database. In the project has been created a dataset with inside a table. In my form i used a datagridview and in automatic have been created BindingSource, TableAdapter, TableAdapterManager and BindingNavigator.
Till here everything is ok because i can add, delete and save members of the table.
Now i wanted to use another datagridview for a research but i don't understand what to use for do that.
procedure to search in a table using a new query?
I know that have been already done this kind of questions but i don't understant if using bindingsource, sqltableadapter, tableadapter ecc..
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Sep 15, 2010
I would like to bind a DataGridView to the results of a query generated as text at runtime.How can I send a query as text to Microsoft Access and bind the results to the DataGridView?When the user clicks the button (ok_btn), I want the contents of the textbox (query_txt.Text) sent to Microsoft Access, then I want the results of the query shown in my DataGridView (results_grid).
Simple one-row queries are fine for now: (SELECT "a";, SELECT "a", "b";, SELECT now();)
NOTE: C# accepted, VB.NET preferred
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Jun 19, 2012
I uses datagridview for show query results from database which may have 0 to x number of rows. So I made calculation to calculate size of underlaying form and my datagridview dependable on number of matched rows. Underlying form is transparent and all of that looks like user control what appears and works just fine. But here is one issue: Every time datagrid have to grow, black square in that area is showed before datagrid is filled, what is not nice and surely unwanted. Did datagridview have some mechanism to freeze it and show data when populating is finished?
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim tw As Integer = 0
Dim n As Integer = 0
Dim sqlText As String
Dim reader As OdbcDataReader = Nothing
[Code] .....
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Jul 22, 2011
I would like to create a vb form with a combo box (with song title), a text box (for song lyrics), and a button (to submit or refresh). It is linked with an access database. The combo box is populated with the songTitle field in the db (this part works fine). The text box is populated with the lyrics that go to that song The first updates fine but I can not figure out how to run a query to pass to the text box's text property. I want the user to be able to select a song from the combo box, click the button, and have the text box populated with the new song's lyrics.
Any suggestions on how to accomplish this, or a good place for a tutorial that explains the necessary elements for having vb query a database and return the results?
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Dec 21, 2011
row in datagridview not come all when query from database (sql server 2008)?
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Mar 8, 2011
I am currently attempting to write a program that will take a SQL query saved as a .sql or .txt and execute it against a specified database, and output the results to file. I have seen some sample code of executing a SQL query line by line,
and writing individual results to file.
The query that needs to be run is only reading information from multiple tables, but is pretty lengthy to do line by line. Is it possible to execute or read the whole query from the .sql file, or a text file, and run it against a specified database, and
have the results of the query output to file in vb.net?
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Aug 27, 2009
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?
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Oct 23, 2009
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.
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May 14, 2009
I want to (SQL) select from a table in an Oracle database, and show the results of the query in the VB application, in a Excel like manner (rows, columns, selectable, etc.). Or in a SQL developer manner. How can I do that? Browsed through a lot of tutorials and howtos on the internet, did not get anywhere. I think (and correct me if I am wrong) that it's gotta be something with DataGridView. But I don't know how to create and populate a datatable with the result of as Select statement, how to create a dataset.
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Apr 10, 2009
How do you carry out a query from a criteria e.g name entered by the user from a textbox. and then display the query results in a list box..
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Feb 18, 2010
I have a query that returns Lname, Fname, and Email. I want to send 1 email (that Is already set up and working) that contains the results of the query as part of the body that includes an additional message; "The persons listed below.........." Need to know how to get them "listed below". Then I want to send a separate e-mail to each email address the query returns, separately not in a group but the same message.
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Jul 12, 2010
I seem to be having a heck of a time trying to figure out how to add the results from a mySQL query to an array in vb.net. Right now, I only understand that you have to define the dimension of the array, however this is shy of impossible since the dimension of the array will change due to different results from the query. What is the proper way to take my results and put them in an array?
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Mar 11, 2010
how to take a query that returns a single row of data and load that data into textbox controls.I know about ExecuteScalar but it is only good for a single column of data from the query.
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Jan 30, 2010
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
[code].....
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Dec 12, 2009
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
[code].....
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Jun 22, 2009
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
[Code] .....
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May 13, 2010
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.
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Jun 6, 2011
i'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.
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Nov 29, 2010
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
[code]....
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Jan 31, 2009
I am using a mysql database and I am trying to get the number of results. I should only have 1 result because this is for a username/password login. I tried this
If loginReader.HasRows Then
'do whatever here
Else
'do something else here
End If
The loginReader gets the results and does the ExecuteReader. The problem with this is that if I use a good username and password it works but if I put in a bad username and password it doesnt do either one of them. Any ideas on how to just count the number of results?
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Mar 11, 2010
Dim da2 As OleDb.OleDbDataAdapter
[code]...
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Mar 11, 2010
Dim da2 As OleDb.OleDbDataAdapter
Dim cols As Integer = Attendance_QueryDataGridView.ColumnCount
Dim rows As Integer = Attendance_QueryDataGridView.Rows.Count
[code].....
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Oct 13, 2010
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.
[Code]...
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Jul 14, 2009
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]
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Sep 2, 2009
displaying it into Datagridview while inserting & deleting records in runtime..I insert records it into database using Access and delete but the datagridview not changes or update.my question is how can i update the datagridview while inserting records and deleting records.[code]
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Jan 7, 2012
This is my code for displaying data, but there's always the TIME on my date column
[Code]...
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