how to read from the first column but I need to read from both of them. I am using full row select which I need on there.Here is the code I am using to get it for the first column.
Dim I As Integer
For I = 0 To ListView1.SelectedItems.Count - 1
MsgBox(ListView1.SelectedItems(I).Text)
Next
How do i apply sub items to colums in listviews in visual basic 2010, so there under the collumn name and look smart The Second one is How do i program functions for when 1 of the subitems are clicked?
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I found and am using this code to move items from listview1 to listview2.Private Sub ListView1_ItemDrag(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemDragEventArgs) Handles ListView1.ItemDrag, ListView1.ItemDrag Dim myItem As ListViewItem
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I am planning on having 12 - 14 listviews on my form.Do I have to copy the above code and name each source and destination listview for all combinations that I want to drag to and from? Or, is there code that will 'read' the source listview1 name when clicking an item from the list and 'read' the listview2 name when the cursor is on the listview I am dropping the item into.Been searching but probably not using correct terms.
I built a form that has 3 Listview objects. Each Listview contains items, the user is to select an item from a Listview and click a button that moves the item "up" or "down" to an adjacent Listview.I am having a difficult time "knowing" which Listview item has been selected. The problem arises once a user has clicked items from different Listviews. Even though, visually, only one item is selected in one Listview, the program still detects a selection from other Listviews.
View 1 RepliesI have a small project i am doing for work to compare our website catalogue to our actual inventory in our financial software. To do this, i have exported the online catalogue as a delimited text file using "^" as the delimiter. I then want to go into our Accpac data a find out if all the items are still active, the current price and the stock on hand.
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I am reading XLS files, via JET provider, using the following
Dim conString As String = "Provider=Microsoft.Jet.OleDb.4.0;data source=" + fileName + ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1;"""
cn = New OleDbConnection(conString)
cn.Open()
da = New OleDbDataAdapter("SELECT * FROM [" & sheetname & "]", cn)
da.Fill(dt)
The problem I am facing now is that some of these excel files have hidden columns: These columns are meant to be ignored. However, the code above fills my datatable with ALL columns (hidden and nothidden). Is there any "Extended Property" that I could add to the connection string, to ignore hidden columns?
Reading Excel in .NET - some columns are read in as null
View 10 RepliesI haven't used VB in 2 years and have forgetten way too much, but I still understand quite a bit. I just can't synthesize it.
Anyways, here is what I am struggling to do.
I have a CSV file as formatted in the screenshot at this link:[URL]
Number of rows can change but the number of columns won't.
I need to:
1:read in a csv file
2:take the second column save the first and last number as a variables for computations (these numbers will be the smallest and largest numbers, respectively if that makes it easier to program)
3:put into the first column of a new array the following computations based on the 2nd column from the csv file computation=((array value-first number)/(last number-first number)*100)
4:add to first column the same computations again but +100 i.e. if the first row had a cell that had computed to 1 then the next number would be 101
5:add to first column again the same computations again but with an addition +100 (+200 total) this should cause the column to have numbers between 0 and 300
6:write column 3 of array to 2nd column of the new array
7:write column 4 of array to the end of 2nd column of the new array
8:write column 5 of array to the end of 2nd column of the new array
9:delete excess array space
10:write new array to txt file with delimiter of " " (a tab) with the same name as the previous file
I have been looking at this for 6 hours now and although I figured out how to read in a csv file, I was not able to figure out how to call up the individual values for computations.
I won't complain if you give me code but what I really want is an understanding of what I need to do to accomplish this.
im usinf Gembox to read Excel files.I'm copying the fields to a datatable, so i have to add the columns to the datatable first.
Therefor im using this code:
For i As Integer = 0 To objWorksheet.Columns.Count - 1
objDataTable.Columns.Add(i, GetType(ExcelCell))
Next
But objWorksheet.Columns.Count is 0 even if theres data in 4 columns.
In my application I read data (using data binding) from an Excel spreadsheet into a DataGridView. This works, but the data columns contain text fields (strings). I would like to set the data type for some columns to "Date" and Decimal. I cant do this on the DataGridView (error: cant change properties for data-bound stuff) and I cant figure out how to do it on the dataset or data-table that I bind to the DataGridView.The following is the code I use to read and bind the data:
Using con As OleDbConnection = New OleDbConnection(cs)
'
'open the OleDbConnection
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The commented out code (below the 'Todo: comment) causes a additional table, but I want to change the table with the data.
I'm filling a combobox from a dataset that has three columns, DealerID, DealerName, DealerState. I can only get one column to display. show two or more columns in a combobox? My code follows:
adapter.Fill(datList, "tblDealerID"))
Dim drDealer as DataRow
For Each drDealer in datList.Tables("tblDealerID").Rows
cboDealer.Items.Add(drDealer("DealerID"))
Next
i have six textboxes from which the user can query the database. Now the user can decide to fill all the fields and query this i have done using AND OR in the sql syntax but the problem is when he decides to leave some blank my program is throwing an exception how can i skip the blank fields and only execute the WHERE clause for the filled boxes.
View 6 RepliesI have a ListView called lv with three columns. What's the quickest and easiest way to add items in it during runtime? I am using WPF.
View 1 RepliesI have a bindingsource that is connected to a table where tho fields determine uniqueness. During a refresh I would like to return to the row that the user was on when he clicked the refresh button. BindingSource.find only supports one column in so far as i have been able to infer. So how doi do it. Altering the table is out of the question. Besides searching on multiple fields is a common event. Like for example first and lastname or perhaps company and journal number.
View 15 RepliesHow can I set up my WPF datagrid to sort on multiple columns similar to having two sortable columns, clicking on the header of the first column for a primary sort and then SHIFT clicking on the header of the second column for a secondary sort. I would like the multiple column sort to happen automatically when the user clicks on the header of the first column without having to SHIFT click on the second column header. Is there a way to do this entirely in the xaml? If not how can I do this in the code behind? Currently using VB.Net but a C# snippet is acceptable if you have one.
View 2 RepliesI have 3 related tables in a DataSet - Customers, Products and Orders.I am trying to create an "editable" DataGridView which, ideally, will contain columns from all the tables. I have tried creating the joins in the TableAdapter SQL, but this results in a read-only data grid.
Customers and Orders are joined in a 1:M relationship by CUSTID.
Products and Orders are joined in a 1:M relationship by PRDID.
When the user adds a new Order record they will key the ORDERID, CUSTID, PRDID and QTY.I would like the DataGridView to display the related CUSNAM and PRDDES as soon as the user has keyed the Order record.The data must be displayed on a single data grid row. I am not interested in drill down or multiple data grids.My data looks like this:
Orders: ORDERID, CUSTID, PRDID, QTY
Products: PRDID, PRDDES
Customers: CUSTID, CUSNAM
The data grid should look like this:
ORDERID, CUSTID, CUSDES, PRDID, PRDDES, QTY
My SQL would look like this:
SELECT Orders.ORDERID, Orders.CUSTID, Customers.CUSNAME, Orders.PRDID, Products.PRDDES, Orders.QTY
FROM (ORDERS
INNER JOIN CUSTOMERS ON Orders.CUSTID = Customers.CUSTID)
INNER JOIN PRODUCTS ON Orders.PRDID = Products.PRDID;
I have put my business logic in a partial class as suggested in best practices. One of the conditions is that one of four fields of a row has have a value. Setting the errorprovider has no problems when creating a new row in the new row event. All the textboxes in the form show the error condition.
Dim ErrorString As String = "A value is needed for at least one of the " & vbCrLf & "Gallon, Fuel, Oil, or Misc fields"
e.Row.SetColumnError("Gallons", ErrorString)[code]....
The logic that sets them back to a no error condition though only sets the currently focused control in the form to no error. When the error is corrected.
MyFuelRow.SetColumnError("Gallons", "")
MyFuelRow.SetColumnError("FuelCost", "")[code]....
How can you reset multiple column errors at once?
Does anyone know how I can go about concatenating multiple columns from a table to populate into a combobox? I have 4 columns from which I need the data to show up in 1 line when clicking on the dropdown/combobox list. I'm not sure if I have to deal with the display member or the value member.
View 2 RepliesI'm trying to figure out how to get a query for multiple columns in my dataviewgrid.. So far i havn't even been able to make a single column query work, when i search something in First_Name for example, it returns nothing. ive used query builer, ive written the code myself, nothing seems to work.
View 3 RepliesI am making a application that manages room availability in a building.I have seen a similar function in another application that I'm trying to duplicate. I want to have a control, which I assume is the DataGridView that shows the room numbers on the left hand side, and then on the right it shows a box in that room numbers row for every day that the room is occupied. If it is occupied for more than one day, the box is joined.What control are they using? How do I link one row cell across multiple columns?
View 3 RepliesI have a list of attachments that I need to group by clientCLID and EmailAddress. From this grouped list I only need a list of clientCLIDs. After fiddling for a while I've managed to get it to work as follows:
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how to make a listbox have multiple columns and for certain columns to be editable.
I thought about using a DataGridView, but I am not linking this to any kind of database.
<vb.net 2008>
Table : MST_COMPANY / EMP_MASTER
Column : COMPANY_ID / LOCATION_ID
How do I add relations for two colums between two tables? I tried below way but it does not work.
Is there any other way?
Dim relCompanyEmp1 As DataRelation = ds.Relations.Add("relSectionEmp", ds.Tables("MST_COMPANY").Columns("COMPANY_ID"), ds.Tables("EMP_MASTER").Columns("COMPANY_ID"))
Dim relCompanyEmp2 As DataRelation = ds.Relations.Add("relSectionEmp", ds.Tables("MST_COMPANY").Columns("LOCATION_ID"), ds.Tables("EMP_MASTER").Columns("LOCATION_ID"))
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How do I sort a DGV by multiple columns.
View 1 RepliesIm making a search function for an application and they need to be able to search by any value in the DB in any of the three tables. Im wondering the best way to go about this. 2 of the 3 tables have the same columns while the last one is totally different. Below is what I kinda "thought" itd look like but no.
"SELECT * FROM cases, opencases, staff WHERE Crime ='" & txtsearch.Text.ToString & "'"
I need to query the results the user can search for anyterm and if it matches something in the columns it return it to the user. Im wondering if the best way to go about this is to maybe query all the tables and then put all the matching records in a seperate table and the dgv look at that table or how to exactly go about it.
I want to add more than one column to a grid...The following does NOT work, how can i do it?
Dim AmountRounds As Integer
DataGridView1.ColumnCount = Amount + 2
Dim contcolumn As New DataGridViewTextBoxColumn
For AmountRounds = 1 To Amount - 1
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i just finally got my code, with the help of you guys, working to fetch column values from my database and display it in a ComboBox.
Now i am thinking to myself that simply displaying a customer's surname just is not enough due to repetitive issues etc. What i propose that i should do is have multiple column values in a the combo box. For example
CustomerID, Surname, Firstname
My current code is:
con = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:My DropboxDocumentsTaxi Service ProjectDatabaseTaxiProjectDatabase.accdb;")
con.Open()
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i want to set my listbox up like:
Name | Posts
so the | is a divider and it will show their name on the left and their posts on the right(kind of like a1, b1 in excel). how do i divide my listbox to do this?
I have 4 textboxes, user puts text in it and it should be displayed in 4 columns in a listbox
I have red how to put text in two columns but cant add to third and forth column
ListView1.Items.Add(TextBox1.Text).SubItems.Add(ComboBox1.Text)
Is it posible to multiply the amount in row 4?
I have some values in 4 rov an i will display the sum of them in a textbox?
Is it possible to show multiple columns and headers inside of a combo box/dropdown list in asp.net and show related columns values, for an example, if I click on a country name then it should show me all the cities for that country and clicking on city name should show me all the related places.
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