I an working on image converting program. I need to convert a file that the user selects in an openfiledialog to the following file types in a folder that the user selects:
.ICO
.PNG
.JPEG
.BMP
.GIF
The user will select which type they want to convert the image to.
Dim Button As ToolStripButton = New ToolStripButton
Button.image = Icon.ExtractAssociatedIcon(exefile)
I try that code, and it just throws me the error that type Icon cannot be converted to Image. So how do i get around this? And does "ExtractAssociatedIcon(exefile)" work on exe files? Admittedly i don't really know what im doing
Dim Button As ToolStripButton = New ToolStripButtonButton.image = Icon.ExtractAssociatedIcon(exefile)I try that code, and it just throws me the error that type Icon cannot be converted to Image.So how do i get around this? And does "ExtractAssociatedIcon(exefile)" work on exe files?
View 3 RepliesIs there any easy way to check if a selection made by a user from the browser is an image type and not any other file type. I could check for extension types i.e. bmp, jpg etc but what I would like to know is whether there is a generic term.
View 4 RepliesI apologize in advance about asking a newbie question. I am a less-than-intermediate programmer who has done most of his work in VB6, and now trying to wrap my mind around the new concepts of the NET languages.In VB 2010, I have a Structure called "Direction", with one data member -- an integer named "Value". It's supposed to represent a value of degrees from 0 to 359.
Public Structure Direction
Private d As Integer
[code].....
i have a column in datagridview composed of numeric as well as aphanumeric. What i want is when the user sorts the column, it will be sorted according to its number value, 1,2,3,4,5,6,7,8,9,10. However it my current module, the program sorts basing the first digit of the column. like 1,10,11,12,2,3,30,31.
i was thinking of converting the type to number so that it will be arrange properly, is this possible in the datagridview to covert type? because i saw only a readonly property celltype? i have also tried casting it in the sql query itself to INT but it did not work.
I have created a PNG image that is 200 DPI, and perfectly sized for a landscape A4 page size. I needed to convert this to a PDF document, so I've used the iTextSharp library with the code below.This all works, however the image quality has degraded.
Public Sub ConvertPNGtoPDF(ByVal inputFile As String, ByVal outputFile As String)
Using fs As New FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None)
Dim document As New Document(PageSize.A4.Rotate, 0, 0, 0, 0)
[code]....
I'm converting a user generated list box to an array and then generating a user defined number of random strings and placing it in a textbox.The code I have works fine as it will generate the number of random strings the user wants, except sometimes a line is blank at the top of the list but is counted as a string.
View 4 RepliesI'm trying to enable toggle type selection on rows of a datagridview, i'm developing my project in Visual Basic .NET.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
With DataGridView1
.Columns.Add("Column1", "Column1")
.Rows.Add(4)
[Code] .....
"Does the selection type of variables speed up the code execution in VB.NET?"For example, I have two same exactly same projects where the first project is running with all Single variables and the other project which running with all Double variables.Is there any difference in term of the speed of code execution?This is because I'm working on a project which is very critical in term of the speed of execution. However, I'm using Double variables for most part of the code.
View 4 RepliesI have a bundle of tiny pictureboxes on a form. The number is specified by the user, but it could be up to 100, or so. The user can select any set of these pictureboxes by a variety of means. I want to change the image to show the selection state of the pictureboxes, and I'm looking for the best way to do that. The pictureboxes each shows a bitmap. The brute force method would be to have a selected image and an unselected image and just swap them, but it seems like there ought to be a way to do something significant and reversible to the image, such as inverting the colors, that might be smaller that having a second copy of each image.
View 5 RepliesI have a program that calculates commission, but if the commission is nothing then I do not want it to show a zero commission. I want a message box to show a message that there is no commission earned.
View 1 RepliesThis program allows a user to select a workshop and a destination, only one selection should be made. When I test I find I can add multiple of the same.
Private Sub ListBox1_Validated(ByVal sender As Object, ByVal e As System.EventArgs) Handles ListBox1.Validated
If ListBox1.SelectedIndex = -1 Then
Beep()
MessageBox.Show("Select a workshop please.")
End If
[Code] .....
I have a combo box that has multiple options, when the user selects one of the options (world wide city destinations) a specific value is assigned to a variable. For example if "New York" is selected the variable "x" is assigned the number 155. What I want to do is output the destination that has been selected ie "New York" in a label called "lblOutput1", do I need to store the destination as a seperate variable to be able to produce it in this label as I cannot seem to get it to work:
At the moment I am using:
lblOutput1.Text = "bla bla bla " + cmbDestination.SelectedText + " bla bla bla " + Today()
I am using visual studio vb 2005 and I searched the forums for an answer to this but didn't find exactly what I was looking for. I am using the following code to populate a list box. What I want is to have a datagrid view show the results of a dataset that is generated when a user selects something from the list box. I know how to generate the dataset, but I'm not sure how to bind that to a datagrid view and I'm not sure what event I should use from the list box.[code]
View 6 RepliesFollowing is my code. Private Structure DISPLAY_ELEMENT_TYPE
[Code]...
Actually this is vb6 to .net converted code. I m getting compile error at following line
temp = Lset(DispElem(i)) bcz Lset is not supported in .Net Lset accept string data type for first parameter and interger for second.If you know any alternet solution or if you have any source code for Explicit convert UDT to string type and vice versa.
I want to do the following
1) Copy a picture in paint (done Manually)
2) Select and copy a portion of it (Done manually)
3) Paste the selection to my image control via clipboard
in other words if in paint I copy a selected portion of an image how Can I get the selection in my vb application via the clipboard?
I have a picturebox with an image in it. I want to 'select' a section of this image (like standard selection tools in other image editors) and place it in another picturebox... The piece I want to select is a square and I have the coordinates.
View 1 RepliesI'm trying to add data into a datagridview cell but I keep on getting a data type error.[code]Value of type 'Char' cannot be converted to 'System. Windows.Forms.DataGridViewCell'.[quote]
View 2 RepliesUsing the code
Dim dr As OleDbDataReader
Dim dbconn As New OleDbConnection
dbconn.ConnectionString =
"Provider=Microsoft.Jet.OLEDB.4.0;Data source=" & "C:MyData.mdb"
[code]....
I can extract
ColumnName = Item
ColumnSize = 80
DataType = System.String
But to write a Parameter I need to convert this to
UpDateCmd.Parameters.Add("Item", OleDbType.BSTR, 80).Value
Is there an easier way of converting DataType = System.String to OleDbType.BSTR than having to make a list with Select Case?Or is there a method to find OleDbType.BSTR rather than reading DataType = System.String?I also tried
SchemaTable = dbconn.GetOleDbSchemaTable(System.Data.OleDb.
OleDbSchemaGuid.Columns, New Object() {Nothing, Nothing, "Auction"})
Dim RowCount As Int32
[code]....
But that also returns DataType = System.String.
I'm using devexpress ASPxComboBox, however I wanted to know how I can allow the user to enter values(in case it is not in the list) or choose from a dropdown list.
View 1 RepliesIn a vb.net windows application, I need user to confirm before closing application. I have this code in FormClosing event
[Code]...
How can I cancel form closing if user clicked No?
Tried e.Cancel = false but it didn't work (exits application).
I have a combobox on a form with the dropdownstyle set to drop down. Users can either salect a value from the list, or type in any value they wish. This all works fine. However, when one particular item in the list is selected I wish to set a different value. Unfortunately I don't appear to be able to set the combobox Text property from within any of the events that fire when the selected item is changed.
[Code]...
I'd like to force a user to make a selection from a combobox.I've tried to test it by Combobox.SelectedText = String.empty as well as another version similar to this but a little different.When I test it, it will tell me that it is still unselected/blank even when I selected something.
View 4 RepliesIs there a way to highlight an item in a VB.Net listbox without allowing the user to change selection?
When I set the selection Mode to "NONE" I can´t select an item in the code.
Same when I disable the listbox.
I have been googled for couple of hours but couldn't find a solution
I m doing a touch screen interface, to browser a page I used a webbrowser control, and in order to get ride of the ugly scrollbar, i m trying to use mousedown and mousemove event on the webbrowser to move the page around, it worked but when i m doing it, it select and highlight the content on the web too, how can i stop that?
do I need to create a extended webbrowser control by Inherits the orginal one?
I want to be able to change an image depending on what is selected in the drop down box. I have this JS code to change the image. Simplified of course.
<script type="text/javascript">
function changeImage() {
var oDDL = document.all("ddlNAME");
var NAME= oDDL.options[oDDL.selectedIndex].text;
switch(NAME) {
[Code] .....
When I call this function I do it in my DDL implementation.
<asp:DropDownList ID="ddlNAME" runat="server" OnTextChanged="changeImage()" >
But for some reason the changeImage() is not firing. It is giving me an error saying
'changeImage' is not a member of 'ASP.default_aspx'
whats the quickest and least application hogging way to retrieve image from web and show in picturebox on listview selection event?
Heres the code i have already which produces app lag for abut 3-5 seconds per image loaded, i think as it stretches the image to fit into picturebox (which is needed)
vb Private Sub bwGetScreen_RunWorkerCompleted(ByVal sender As System.Object, ByVal e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles bwGetScreen.RunWorkerCompleted
For l As Integer = 0 To ListView2.Items.Count - 1 'start download selected If ListView2.Items(l).Selected = True Then Dim fileid As String = ListView2.Items(l).SubItems(5).Text.ToLower Dim recordid As String = ListView2.Items(l).SubItems(6).Text.ToLower + 1 urlpic = "http://se-board.com/index.php?app=downloads&module=display§ion=screenshot&full=1&id=" & fileid.ToString() & "&record=" & recordid.ToString()
[Code]...
If i wanted to crop an image in VB.net, how would I go about doing it? I am trying to let the user drag out the box they want (system.drawing.rectangle), and it will automatically remove the edges surrounding the box.
My first problem is primarily the fact that I cannot make the system.drawing.rectangle visible. It is not displaying at all, I am setting its location and height programmatically, but nothing is showing up. I know there is probably something fairly obvious I am missing...but I cannot seem to find it.
My larger issue, however, lies with the cropping itself. I cannot find any crop methods, at all. Is there a hidden one I am missing? Or must I code it myself? How would I go about doing this? It ought to be able to output to a bitmap image object.
I have in my My.Settings four settings [code] now I want to get the value of the current setting from the My.Settings.SettingName. [code]
View 1 Replies
