essentially what i'm trying to do here is Have the combobox in Form1 List the values in that column of Table1 (i can get it to do that), but when i click on one it adds it into the PRTNUM column in current row of datatable Table2.
View 4 RepliesI have two forms ( form1, form2) with a textbox on form1 and a combobox on form2. The combobox is databinded. What I have been trying to do with no success is to alter the combobox during runtime from form1. In the textbox the text displayed always corresponds to the values binded with the combobox. I want to set the selected/displayed value of the combobox to be the text that is on the textbox. This to be done on a button click from form1. I have tried the findstring and findstringexact to locate the index of the corresponding text and alter but nothing. After so many testing I soon realised that if the combobox is at form1 together with the textbox I can do whatever I want with it. But when is on form2 I cannot do anything. When I mean anything I have tried clearing the displayed value with 'selecteditem = Nothing' with no success plus whatever else I try. [code]...
View 1 Repliesi hav addded 2 combbox colomns into datagridview. i need to changed one combobx cell and need to get the value for second combobx colomn.
View 2 RepliesA menustrip button click allows you to browse for a text file which when you open will take the text in the notepad and put it in a dropdown combobox. The text in the notepad would have to be
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When i select an item in combobox1 suppose pen then its subitems should come in combox2 say parker, lexi etc. ..
View 3 Replieshow to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As
[code].....
I would like to sum data in dataTable from to if ColumnLine <> SA sum only HINKSHKEY = 1 if ColumnLine = SA sum all data I try to use code below but it not work.
[Code]...
I'm not really sure how a datatable is really used, but I've used it in an application I'm writing, by way of examples I've found online. Basically can anyone give me an explanation of datatables in laymen's terms? Second I have an example to discuss. I have a datatable that is filled with a result from a MySQL query. How can I populate a textbox with a specific item from the datatable?
View 2 RepliesI am little bit stuck here .. I have a datatable as _
Dim dtPupil As New DataTable
dtPupil.Columns.Add("PupilId", GetType(Integer))
dtPupil.Columns.Add("Forename", GetType(String))
dtPupil.Columns.Add("Surname", GetType(String))
I made a select (assuming names combination will be unique)
Dim strQuery As String = "Forename ='" & forename & "' and Surname = '" & surname & "'"
Dim dr As DataRow()
dr = dTablePupil.Select(strQuery)
I wanna have PupilId as an Integer of the row that match, so
Dim PupilID As Integer = ??????????
What do I need to write here ? There will only be 1 row returned.
i have a problem when add data into dataTable. The problem is that after populating the dataTable with the 1st, and when adding a 2nd column, the row that contain the data is not at 1st row of 2nd column. It is directly under 1st column row. For example, column 1 has 10 rows of data. After adding the 2nd column, the data is at row 11 instead on the 1st row. Can someone tell me how to add the data for 2nd column so that it will be in the 1st row. Code for adding the data
Dim col1 As DataColumn
Dim row1 As DataRow
col1 = New DataColumn("Column 2", System.Type.GetType(" System.String"))
dTable.Columns.Add(col1)
[code]...
I am trying to import a large array of integers stored as a csv file into a VB.Net DataTable called BeamMap. The .csv file consists only of integers, with a delimiter of ,, no quotes around the data (ie., 1,3,-2,44,1), and an end of line character of line feed and carriage return. All I want to do is get each integer into a DataTable cell with the appropriate rows and columns (there are the same number of columns for each row) and be able to reference it later on in my code. I really don't want anything more than absolutely necessary in the code (no titles, captions, headings, etc.), and I need it to be fairly efficient (the csv array is approx. ~1000 x ~1000).
View 2 RepliesHow to copy all datagridview data into a datatable ?
View 1 RepliesUsing VB .NET, I am wondering about the best way to get some statistical data out of a Datatable. I would rather not hit the database with another query, but just look through the datatable I already have. So, Linq must be the answer? I have a datatable (dtable) containing two columns: tech_id and colour. From this, I would like a new datatable containing three columns: tech_id, colour, and count. Of course, I'm trying to find out how many times each "tech_id" used each distinct "colour".
Something like:
tech_id colour count
------------------------------
JM brown 18
JM purple 10
JM green 3
PB brown 51
PB grey 8
TD brown 4
TD pink 67
TD grey 41
My best attempt with Linq is not at all correct, but is pasted below to show how far I've got:
Dim ColourCounts = From p In PGWorkingDataTable.AsEnumerable() _
Group p By p.Field(Of String)("colour") Into Count() _
Select tech_id, colour, ColourCount = Count
Dim colourStatsTable As DataTable = ColourCounts.CopyToDataTable()
I have a dataset and inside it a dataTable. How can I retrieve the data of the datatable?[code]...
View 4 RepliesI'm using two textbox's to enter text and retrieve the data and then show that data in a datagridview.Here is my
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
[code].....
I would like to sort data in my datatable I am focusing on one of my columns that I want to sort in ascending order. Currently I have been using the following code
[Code]...
I nwant to sort the data so that I can output the data in a gridview.
I've got a datatable not attached to the database. It contains essentially raw data. I want to take that raw data and then process it more by running a select statement that includes a couple of sums and group by phrase.However, I can't figure out how to run a select statement on a datatable that is already in RAM. I created Table 1 and massaged it by adding some more columns after pulling the original data. There will be more in the final SQL Statement but I can't get this to work.
Table 1 (works fine)
Customer, InvDate, Amount
Contains multiple records for the same customer.[code].....
This table should only be one record per customer showing total amount of all invoices.I've been searching the internet for a couple of days but no luck so far.
i want 2 copy some part of one table into another but getting error @ this line
sqlCmd = New SqlCommand("insert into name_table(name) values ('" & ds.Tables(0).Rows(1).Item(0) & "'", sqlCnn)
i have 2 forms. In form1, I created a dataTable with 10 rows of data to be display in Form2. However, when in Form2, I can see all the info. But when i created an button to count the number of rows, it return 0 where there is obviously 10. I understand that in Form2, in order to count the table, i have to create a new variable for DataTable. And this variable in Form2 is actually create a new dataTable. is there a way for me to access the same dataTable that is created in Form1 in Form2?
View 3 RepliesI have a large data.DataTable and some formatting rules to apply.For example, the LASTNAME column has a value of "Jones" but my formatting rule requires it be 10 characters padded with spaces on the right and uppercase only. Like: "JONES "My initial thought is to loop through each row and generate a string. But, I wonder if I could accomplish this more efficiently with a DataView, LINQ or something else.
View 1 RepliesIs there a dll somewhere or some place I can read a good example on how to add data from a datatable into a multicolumn combobox? Preferably to be able to stick a datagridview right into the combobox would be awesome.
View 3 RepliesI am trying to add data to a access datatable column I am using a richttextbox to fill in any data but when i save it to a column in a database and if there are more chars then 255 then i get an error (try to enter more then column lenght) anything under 255 is working fine the column in access = type of 'MEMO' so no limited to 255 it's the hystory to send that is giving me the problem
Dim history_to_send As String
Dim day_to_send As Date
Dim ID_to_send As Integer
[Code]....
I have been having trouble finding a good way to do this. Basically what I need to do is take a query from a SQL Server Database and place it into a DataTable (or an array) for manipulation. I've got the connection and everything working, but none of the methods I've tried so far seem to work very well.I need it to compare data with an uploaded CSV file and post on a website.
View 1 RepliesI used a table adapter to fill a data table from a sql database.then made the datatable the source to a datagridview.how do i change data in the datatable, and how do i save it back to the sql database.
View 1 RepliesHow can I fill Datatable with DataGridView data (VB/C# .NET)?
View 1 RepliesWhen my application loops through the first code block below, I get valid data for all datarow fields. [code]...
But I get an error when looping through that code block "Collection was modified; enumeration operation might not execute." [code]...
However, in the second code block, I get a valid record for MgrID, but I get a blank value for the other fields.
When I look in the database, all fields in that table have valid values.
I am new at asp.net, so I would be glad, if anybody could help me in this case... I scanned already the internet for answers, unfortunately with no success..I have a grid view, and this is loaded by a sql data table, this table has 2 keys (RezeptNr and Zutatnr). When I wanna update a row in the data grid, the RowUpdating event fires, so I need to read the Basket Session, what has the complete object stored. I put this in a DataTable (dt1), so far so good..The problem is line: Dim dr As System.Data.DataRow = dt1.Rows.Find(id) Here the compiler alerts, that I have two keys, and he cannot select the data sentence with the find method. I tried it with datatable.select command, that works, but then I have the data sentence in an array, but I need to update the data row of the data table.
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I'm facing a problem with a datagridview datasorce, or refreshing it. I'll try to explain what is happening. So I have a datagridview called dgvMaterials, I'm binding datasorce to the datagridview from one table in mySQL server. Here is the code:
Dim ds As New DataSet
Private Sub frmSettings_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I have a question for store data from vb.net
I want to store data a file without use any database engin and
Retrieve and save data from DataTable