how to refer to a column created in code for a listview, I need to set it's width property but don't know how to refer to it in code.
lsvOrderDetails.Columns.Clear()
lsvOrderDetails.Columns.Add("Product")
I have 4 textbox on my formviz. txtQuantity0, txtRate0, txtDiscount0, txtAmount0When User Press Enter Key on txtAmount0 a new row of textbox is created as follows
txtQuantity1, txtRate1, txtDiscount1, txtAmount1
I have a Gridview that I create a dynamic footer wired up to the RowDataBound event.
However there is a 50/50 chance that 3 of the columns will have no data.
I want to be able to dynamically hide the columns with no data if possible.
I have tried doing this in the RowDatabound event by checking if the value is = 0 but that does not work because I think the event is called to early?
Is there anyway to refer to the values in the Footer row after ALL the data has been bound?
Ideally in VB
`Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
[Code].....
I am using VB to make a file editing system that allows the user to edit multiple files on multiple tabs like Notpad++.I hit a slight snag though. Seeing as tabs don't contain text, I add a textbox to each tab upon creation.For loading files I want to check if the current tab's textbox is empty so I don't end up adding the loaded file as a new tab, which would just create clutter (like how when word opens a file, it checks if the current document is an unsaved file with no text before loading.)Problem is, how do I check this with tabs I haven't added yet? (Ie will be added whilst the program is running as opposed to in design mode)
View 2 RepliesI have a listview with several columns. I want to change the column header using code.
View 1 RepliesI hope the question makes sense, anyways. I'm looking to know if in VB.NET, when we call an object's constructor, is there some kind of a reference that points back to the caller? I'm interested because of a corner case where I want the object being created to first be able to validate the existence of some data in the caller before it allows itself to be created. If this validation fails, I plan on throwing an exception. This corner case will never happen at runtime unless the object being created is used improperly by a programmer. The object being created is not inheriting the object I want it to validate, so I can't do anything with the MyBase qualifier.
It's bit of a "future-proofing" issue that I have a (bad) habit of doing. Not critical -- I can always leave stern comments behind as a last resort. Wanted to know if this was possible.
I have been trying to find out how to resize listview column width to the largest widthor either column header or item in c#
[URL]
I have a listview and i want to make one column's font smaller than the other column to fit form design. How will i do that?
View 1 Repliesim trying to make the listview sort the listview items by column (whichever column was clicked, sort the list based on that column)
in vb6 it was done by:
Private Sub ListView1_ColumnClick(ByVal ColumnHeader As MSComctlLib.ColumnHeader)
Static olditem&
With ListView1
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In my project, I have a local dataset (XSD) that I am using as local-temporary tables. I am getting a System.InvalidCastException when trying to access the field in one the tables. I believe this is because I my code is (incorrectly) not setting a field's value in a row before trying to access it.My problem is that the exception is breaking in the designer file and not in my code. As a result, I'm having difficulting determining which line of my code reading the field value before it has been set. Is there any way to configure Visual Studio to break in my code instead of in the designer created file?
View 1 RepliesI have programmatically created a listview in n # of tabpages to display information gathered from an SQL database.Once created, i want the user to be able to select an item from any of the listview's. How can i reference the selected item?[code...]
All i want is to know that when a button control is clicked, which item is being selected in which listview?
My program creates columns at runtime with the following code:
Cmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd.ExecuteNonQuery()
I add data into the newly inserted column with the following code:
da.SelectCommand = New OleDb.OleDbCommand(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
cb.QuotePrefix = "["
cb.QuoteSuffix = "]"
ds.Tables("SchoolMaticsDatabase").Rows(inc).Item(ColumnDate) = Hours * Num
da.Update(ds, "SchoolMaticsDatabase")
All of the above works fine; the issue arises when I try to edit the information originally placed in the newly added column. These are the approaches that I have taken. (None of them give an error message; it simply won't update within the database.)
da.SelectCommand = New OleDb.OleDbCommand(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
cb.QuotePrefix = "["
[code]....
I added a column to the table manually via opening the access database and all the above approaches work for editing data stored in that column. So I believe it is something to do with the fact that the columns are created at run time.
ok this generates the boxes. I have another set of pictureboxes and i was wondering how i would be able to move those pictureboxes to the pictureboxes that were generated based on the row,column, letters, direction(left,right,horizontal etc.) they pick
For i = 1 To 15
For j = 1 To 15
buttonnum = (j - 1) * 15 + i
[Code]....
VB GridView control will not allow code in the vb code file to access a data column that has its visible property set to false. When it is set to true, the data column can be accessed with no problem. Any suggestions as to how to correct this? I have looked through the documentation, text books, and I have not found anything that gave me any clue as to what the problem could be. I thought that the property was just applied to the column, not that it would remove the column from being accessible.
[Code]...
My program creates columns at runtime with the following
Cmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd = New OleDb.OleDbCommand("ALTER TABLE [Parent] ADD [" & ColumnDate & "] int", con)
objCmd.ExecuteNonQuery()
I add data into the newly inserted column with the following
da.SelectCommand = New OleDb.OleDbCommand(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
cb.QuotePrefix = "["
[code]....
I added a column to the table manually via opening the access database and all the above approaches work for editing data stored in that column. So I believe it is something to do with the fact that the columns are created at run time.
I can do this using VBA, but I want to be able to create the code using a compiled VB programme, which can then be opened in Excel.
View 1 RepliesI'm trying to add to the second column of my listview but i forget the code mine so far is:[code]
View 7 RepliesHow to write Query to Display Column Names of HTML table in ListView
View 2 RepliesI have a listview which has 6 columns on it. I want to hide the 6th column. Is this possible? I created the columns in the lv in the designer.
View 3 RepliesI have never programmed anything in my life -- and I'm learning VB from a tutorial which I found here:[URL]...So I've created my button and added the code. Then it says:
"Now run your first application!"I have no idea how to do that!
I have created all the controls in my app in vb.net code. I have checkboxes that I want to be able to check the state in code and also check or uncheck if i need to this is my code which does not work
[Code]...
I create many buttons in code like :
Public Sub GenereTextBox(ByVal rep As String)
Dim txt As New TextBox
Dim fnt As Font
fnt = Me.Font
txt.Location = New Drawing.Point(26 + NbreCacher * (68), txtOrdonnee)
[Code] .....
And I want delete some buttons create when I click on my button, but I don't how I can do, because these buttons are create in code??
I am writing a game tenetivly labeled Code Invaders. It is similar to space invaders in which a space ship shoots out lasers at the incoming enemies. My problem is the lasers exiting the space ship. I can create them except they won't move...
Public Class frmMainInvasion
Dim activationCheck As Boolean = False
Private Sub frmMainInvasion_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
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I'm making a program where at the click of a button, a textbox is added to the form.
Basically, right now my code looks like this:
----------------
(Public)
Dim i As Integer = 0
Dim s As String = ""
[Code]...
Now when the user clicks a different button, I want it to get the value of the textboxes that were created in the code.
How I can add a item in Listview under column 2?
View 4 RepliesHow do i add images to the first column of a listview in vb.net 2008..?
View 2 RepliesI am having trouble adding a row that displays all the values of the member of an object. [code]...
View 1 RepliesHow do I enter a value into column 2 of a ListView.
I use ListView.Items.Add() to enter in the first column, this works ok.
How can I get the AVERAGE number from the column of ListView1.Items(ListView1.Items.Count - 1).SubItems.Add((reader("High").ToString) - (reader("Low").ToString)) and shows the AVERAGE number on the label.
Dim Cmd As SqlCommand = New SqlCommand(SelectCmd, conn)
Dim reader As SqlDataReader
reader = Cmd.ExecuteReader()
[code]....
That will be the number i would like to have it on the label.
Is it possible to hide a listview control column? I want to have the first column hidden but with value held in it. I have Columns like StudentID, Student Name and StudentAddress and i am using StudentID as a primary key that is used to manipulate database. Below is my code. My code given below populates the list view. This function takes the SQL as query string and ListView as the name of the control.
[code]...