VB ListView DragOver Event On Column Headers Or Blank Rows?
Aug 26, 2009
Does anyone know why a ListViews dragover event does not fire when dragging over a listview column header or an empty row?I'm trying to highlight the row a user is dragging over. Everything works with the exception that when I drag over the column header or an empty row the previous row stays highlighted since the dragover event doesnt fire. Is there another event that I should be looking at? I've checked the hover over and it doesnt fire either.
I am trying to change the forecolor and backcolor of the column headers in a ListView and I have been able to change the background color; however, now the text has disappeared (the text that shows up in the column headers). How do I go about specifying Color.Argb(193, 218, 248) as the text color? Please advise as I have searched all night online and have not been successful as of yet.
I have a listview control that I have a multitude of files displayed, in addition there are 6 columns in the listview that shows information about the file in question.
I have gotten this far, but my question is this: how do I allow the user to sort the listview by clicking on the column headers. Like one can do in list view in a Windows window?
I have tried many different ways to make this work. Every attempt causes a pause where the drag operation is not recognizing the drop sites under it. There are many long narrow flowLayoutPanels that allowdrop of my button. I am basically wanting the scrollbar(vsFLP_UnitPanel) to scroll if the condition is met. It works, but for some reason there is a pause when the scroll begins.
Try If e.Data.GetDataPresent("myButton") Then Dim show As Integer
I would like to highlight the item in a listview that the mouse is hovering over during a drag-drop operation. I'm using a similar method for treeview that works great, but for a listview I'm having trouble. I found a C# example online, but the VB.Net equivalent did not work, unless I translated incorrectly. Here is my
VB.NET Private Sub AddonDirList_DragOver(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles AddonDirList.DragOver Dim hoveritem As ListViewItem = AddonDirList.GetItemAt(e.X, e.Y) hoveritem.Selected = True hoveritem.EnsureVisible() End Sub
When I use this code, not only does the highlight not work, but the drag-drop operation does not work at all. Rather than the typical drag-drop mouse pointer, the circle with diagonal line pointer is shown, which is what you would normally see if the listview did not have dropping enabled.
I want to change the orientation of rows and headers in a datagridview using a deserialised class as a dataset so that rows are displayed as columns and columns as rows. How do I do this?
I am populating a datagridview with data from a table and some unbound columns This is a large table and I want the form to fill the screen and the datagridview to fill the top half of the form. To do this, I have put a panel on the top and a panel at the bottom.I have anchored the dgv to the top left and docked it to the toplumnHeaderHeightSize is AutoSizehe issue is that the ColumnHeaders are not visible unless I click on the restore down button on the top right part of the screen
I have a csv file that is being sent to me in this format[code]...
This is the only way this file can be exported from the system that is sending the information.
The second item is the Header and of course the 3rd would be the value that needs to be inserted into the row. How do I import a file like this. It is going to be sent to me every 5 minutes so I have to be able to extract the data shortly after the file arrives and insert it into Sql server.
What I'm trying to do is parse a CSV file that has column headers, and map those headers - ideally to a class.The tricky part is that I need to be able to support various mappings because it will be interacting with different systems that give the headers different names. Additionally, being able to combine fields would be extremely helpful.
Fortunately, the CSV will always be correctly formatted with all fields encapsulated in double quotes.
Having an issue with a Datagridview that I am trying to create. What I need is for not only column headers but row headers. If you are not sure what I mean, take a look at this image;
[Code]...
Notice how the screen shot has a column and row headers? Now I do not need the "view selector". To make matters worse I need to have two row headers. Kind of like this;
following is the code at button event which copy data from one DGV (dgvAccesList) to another DGV (dgvProbReport) and its working properly. Its paste data to 3rd and 4th column of destination DGV.But the problem is that, if at source DGV first column and second column have data..lets say up to 2 rows..then its copied data starting from 3rd row..for the 3rd and 4th column..which is incorrect..its should be always start with first row of third and fourth column.[code]
Using Visual Basics Express 2008, I am trying to add items to a combo box FROM column headers in a datagrid in a separate form. I have written the code to create the datagrid from an external file but can not get the headers of that datagrid to populate the combo box in a separate form.
Here is my working code for Form1 (frmMain):
Private Sub cmdConvertTxt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdPart.Click Dim dt As New DataTable
I have a vb.net website with a gridview that currently has exam questions displaying vertically in each row like this:
Name question answer ----------------------- Joe question1 answer1 Joe question2 answer2
[code]....
But I would like to change it, so that each question is a header, like this:
Name question1 question2 question3 ---------------------------------- Joe answer1 answer2 answer3 Jill answer1 answer2 answer3
This makes it more readable since each user is only listed once.I would like to stick with a gridview instead of rewriting all my code.I am actually binding my data to the gridview via some other programmers class. I am using LINQ like this:
I need to create a checkedlistbox that has multiple columns and each column has a header. Is this possible? I can't really find much on Google. Here's the headers I need:
Checkbox Title Existing path Destination path
I have created these columns to the checkedlistbox I have in my form, but when it is run the headers don't show up. Also the items I'm adding don't seem to abiding to the column widths I put in. Also with the code I'm providing below the items don't display as multiple rows, meaning each item doesn't get displayed on a new row, but in a new column.
vb For i = 0 To iMovies Movie = New MovieItem() Movie.tmdbid = CInt(StrBetween(moviestag, "<tmdbid>", "</tmdbid>"))
DataGridView inserting an extra row every time I populate with data. The row appears even if I only fill the column headers. This is causing problems when I try to get values of each cell. Is there a way to avoid this perhaps in properties?
I am using this code i found from links on this site to export data grid information to excel. it works great! I am trying to figure out how to first write the column headers to excel and then the data in the columns.
Private Sub exportExcel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles exportExcel.Click Dim xlApp As Excel.Application Dim xlWorkBook As Excel.Workbook
Background: Users fill out a form that has 14 fields (radio buttons, checkboxes, textboxes, or listsboxes) in it. I have these fields populate into array list for each field. When the Write and Exit button are clicked the information in the arrary lists are combined and written to the text file that was appended when the form loaded.[code]...
I am using VB.net 2008 express edition. I have figured out how to use some of the code snippets for the open xml sdk to create a drop down list of all the sheets in an excel file. I can also use the code snippet to get the value of an individual column header. What I want is a drop down list of all column headers. I could create an array containing the alphabet and loop through each column based on the alphabet letter in the array. I would then just exit the loop on the first column with no value returned for column header...but there must be an easy way to return all headers in one query of the xml.
I have created a Stored Procedure in SQL which produces a pivot table. I've successfully created a GridView in ASP.NET to display this data.
However, some of my column headings are dynamically generated from the data (AutoGenerateColumns=True), and those column headings are just dates, so they will look different almost every time the table is generated.
This all works fine, except that the date format of the column headings is wrong. I know I could change the way SQL produces the dates in its output, but I don't want to do it that way. I want to control it from the web page.
I didn't think this would be difficult - I thought I could just do something along the lines of finding the cells in the header row and changing the datastringformat. The problem is that whether I put my code in the GridView's DataBound or RowDataBound event, the cells in the header row seem to be empty, so I can't reformat them. It's as if the headers get populate some time AFTER the DataBound event, but I don't know when or how to trap it.
IDE: VB Express 2008Problem: Painting DataGridView Columns.I have done extensive Google searches and found very little on the subject.I have searched this site to no avail.
