VS 2008 Querying Data Out Of Datagrid In Win App?
Nov 10, 2010
i would like to check the possibilities to draw out data from a data grid, which is currently showing out some data in it.the datagrid contains 2 columns in it,but will display only one column at run time. The result is assumed to get changed according to some parameter values.
So i need to query the value of first column and i need to use it as parameter for a report in report viewer.i am trying it in VB.NET.Kindly let me know whether the above is possible? if so please do let me know how to start.
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Jan 17, 2011
the remaining code for my vb.net project? In my Project, I have a table name tblBatch that has a field name btchGravel. Since in my project, a field name gravel has more than 10 inputs from the 10 textboxes in my main form. I manage to save it in this manner:
'Save the textboxes in a single string, separated by comma
Dim GravelLine As String
GravelLine = txt1G.Text & "," & txt2G.Text & "," & txt3G.Text _
[code]......
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Aug 7, 2010
My form has a DateTimePicker and a DataGridView on it. I need to have it query a SQL Server DB and return the table to the DGV. The query is to search the Date_Joined field for date less than the date that the user input with the DTP. With the code below, my DGV is populated with all data and not the filtered data I need. I also have added a Go button for the purpose of execution instead of using the ValueChanged sub for the DTP.
Private Sub btnGo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGo.Click
Dim query As String
'dtpDateJoined is a DateTimePicker on the form
[code].....
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Mar 23, 2010
vb
Dim conn As New OleDb.OleDbConnection(ConnStr)
conn.Open()
[code].....
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Oct 2, 2009
I have a DataTable filled with employee names and hours. I want to query that data to make a list of all the unique employees and the total hours for each, but I don't know how to do that. If I were to query the database directly I would do something like this
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Aug 9, 2009
Microsoft Access 07
Visual Basic/Studio - 08
Windows XP / Vista
im currently working on a program which must connect to a microsoft access 07 database file and do various operations on the data and then resave the data.Currently i can get the information displayed in a table using a DataGrid and browse through the data by scrolling or using a combo box which i linked to the data.
I am making a query for a quick search function using a text box and a button. I have the sql already however i need some help implementing the variable QSearch into the sql. QSearch is the variable which stores the infomation in the quick search text box. The query is currently in the TableAdapter section of DataSet.xsd ?
SELECT *
FROM Members
WHERE (any row is like QSearch)
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Sep 20, 2009
Use the Invoice Class provided to create an array of Invoice Objects. Class Invoice includes four properties- a PartNumber (type integer), a PartDescription (type String), a Quantity of the item being purchased (type Integer), and a Price (type Decimal). Write a Console Application that performs the following queries on the array of Invoice objects and displays the results:
a. Use LINQ to sort the Invoice Objects by PartNumber
b. Use LINQ to sort the Invoice objects by Price
c. Use LINQ to select the PartDescription and Quantity and sort the results by Quantity
d. Use LINQ to select from each Invoice the PartDescrition and the value of the Invoice (i.e. Quantity * Price). Name the calculated column InvoiceTotal. Order the results by InvoiceTotal.
e. Using the results of the LINQ query in Pard d, select the InvoiceTotals in the range of $200 to $500
I am pretty sure I have parts a, b, & c completed correctly. Or at least the provide the desired results. Part d I figured out how to multiply the 2 fields but can't create a new column for the result or figure out how to show the PartDescription with the multiplied result. Part c I think I can figure out when I get part d. I already coded what I think will work for part c.
Below are the 2 Objects the Invoice was given and not to be changed & the LINQ is the one I have been working on.
Module LINQ
Sub Main()
' array of invoices
Dim invoices As Invoice() = { _
New Invoice("83", "Electric Sander", "7", 59.98), _
[Code] .....
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Sep 28, 2010
how to print a data in datagrid..?
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Jul 24, 2009
I have a database and I was thinking about using either a List Box or Data Grid to show the data. Is there is another way of showing the data? Also, when the user 'double-clicks' on the data in the List Box or Data Grid then I would like the information to come up in a new form. I know how to show a new form but I don't know how to get the information from the one that has been clicked.
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Nov 12, 2010
how to insert data to a datagrid at run time, like values for the columns will be entered in text boxes and after cliking a button it should get inserted in to the data grid and have to be displayed immediately in the grid.
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Nov 27, 2009
I have DataGrid full of data looks like this.
Cell_0 | Cell_1 | Cell_2 | Cell_3
-------------------------------
string | string | string | string
[code].....
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Mar 9, 2010
How can i limit the user to enter only certain data in a datagrid. Lets say 0 - 9 only. When the user try's to enter any other char, it should stay 0
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Sep 8, 2009
I need to read data from text file to datagrid. I have a datagrid with 3 columns: Column1, Column2, Column3. I have two columns in my text file, eache is separated by double space. I need to make so that column1 from text file goes to column1 into datagrid and colunm2 from text file goes to column3 into datagrid. Column2 in datagrid will be filled with values from OPC server. So i made a simple
Dim mSr As StreamReader = New StreamReader("C:VBpirm.txt")
Dim mLine As String = Nothing
Dim mArray() As String
[Code]...
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May 21, 2009
I haves textboxes and a ddatagrid and a report. This is how I put the the data of the textboxes in my dataset and show the report, but I was unable to show my data in the datagrid in the report, how can I do? It�s not possible two datasource
[Code]...
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May 5, 2012
I'm working on a mobile project, and I have this:
search textbox (fillby method)
combobox (bound to the data)
datagrid
[code].....
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Jan 22, 2009
I placed a datagrid in my form which l retrive data from my sql. i am using oledb connection. if i run the form i can retrive the data but i am not getting the data in the grid at first ,there is a "+" sign, i have to clik that then it shows the table name and after clicking the table name i can view the data displays in the grid..
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May 4, 2009
I'm using the 2008 express edition. Now, I created an application that will allow the user to choose transaction in the combobox.text and input its price and quantity using an textbox.text. When the user click button1, it will be push in the datagrid/datable I created. And when the user click the button2, it must be save to excel file. The only thing I need is how to save the data from datagrid/datatable to excel. This is my code.
Imports System.Data
Imports System.Data.SqlClient
Imports Excel = Microsoft.Office.Interop.Excel
[Code]....
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Sep 27, 2010
None of the Microsoft videos I have watched, or the other posts I have seen, have given me the pieces I need to understand this process. This is the one key piece of understanding that I need to finish about 4 different programs I have started in the last 2 years. All of them key on understanding the following processes:
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Mar 5, 2011
Possible Duplicate: DataGridView - Validating for Cell?i have a requirement. i dont know how to get the data from the datagrid after the user entered data in textboxcolumn. i also want to validate the entered text in datagrid cell.
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Oct 31, 2010
i want to binding excel data to a datagrid without no header, just the data.for example :my excel files consist of 3x3 matriks data in 3x3 excel cell like this
1 2 3
4 5 6
7 8 9
and i want to show all this data on data grid i have tried with some code like this
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
Dim ds As New DataSet
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0; " & _
[code]....
but the first row of that data ( 1 2 3 ) is not shown up in the datagrid, just the 2nd and the 3rd row that shown up in datagrid?
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Apr 22, 2009
have made a connection to a database through VB and i was able to extract a single value from a record and display it in a datagrid table, but i don't know how to display that value in a textbox. i tried doing e.g. txtABC.text = datagrid123.item but it seems that the values cannot be converted between the datagrid and the textbox.
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May 25, 2009
IErrorInfo.GetDescription failed with E_FAIL(0x80004005).I get this error when trying to send a query to a database. Its an access 2000 DB. Google suggests the error indicates that I am using a vb keyword as a field name or table name. I have checked with these here and can't see anything that matches.
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Apr 12, 2010
I'm using VB.net for a project i'm building for a friend. He has access to data on all the schools in our country and also data on the local area Authorities which run these schools. I have a database with two related tables; 'TBLlocalauthority' and 'TBLschools'. Each localauthority can have several schools, but each school can only have one local authority.
[Code]...
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Sep 10, 2010
Is there a particular class in .NET available that will allow a user to query IIS to see what websites are running on the local server? I would like to try to write a simple program that programmitically lets me know which websites are running in IIS along with some basic information about them. Can this be done in VB?
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Jun 15, 2011
Whenever I have
Dim catID as integer
And I use this in a query like this:
cmd.CommandText = "select * from categories where parentid='" + catID + "'"
I get:
Conversion from string select * from categories where p to type Double is not valid.
Why is it so?The parentid datatype in sql is integer.
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Jun 11, 2011
Is it possible to re-use a DataTable in .net? Here's an example from code-behind:
[Code]...
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May 28, 2009
I have some sql statement error while querying the DB and to display the result on a data grid view. Could someone check the codes below and let me know the problem with the codes.
Dim cm As New System.Data.OleDb.OleDbCommand
Dim rd As System.Data.OleDb.OleDbDataReader
Dim Conn As OleDbConnection
[code].....
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Dec 24, 2009
I`d like to do a query to a SQL server database using the statements like "SELECT...FROM...." an so on. Then I`d like to save results of the query to an array or other variables. I`d like to handle the data of the query results "manually". I don`t want to use the datagridview and tableadapters and so on which are created when I drag a table from the datasources window to the form. is the ADO.NET and datasets the right tool at all? If yes, I believe these are the first steps needed:
- create a connection string
- create a connection and open it
- create a dataadabter
- create a dataset and populate it with the dataadabter
The first problem is the connection string. When I create a connection to a new data source in datasources window, a string is created and saved to some configuration file. Can I use it and how?
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Mar 15, 2012
Basically for normal select queries from my database I have no problems as I would put the following and then bind it to a controller to display the iteam, however now I am trying to query sum of a field from the database, but I think it should be different as It's giving a Nullable value:
SELECT SUM(PointsRedeemed) AS tAward
FROM [Transaction]
WHERE (BusinessId = ?) AND (CardNo = ?)
[Code]....
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Nov 25, 2010
I am trying to create a stock scanner which allows users to filter stocks based on multiple criteria that they select. Like the following example with 2 criteria:
Criteria 1 Filtered Result: StockA, StockB, StockC, StockD
Criteria 2 Filtered Result: Stock B, Stock C, StockE, StockF
SCANNER RESULT: Stock B, StockC (ideally this result would be displayed in a GridView)
[code]......
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