C# :: Can't Set Image For User Control In Winform
Nov 12, 2014
So I am upgrading the system from 3.5 .NET to 4.5.1 and fixing any bug that I could find. Long story short, I run into an issue that basically tell me it couldn't find the images in the resource file. I figured out a work around, but first I have to set the picture box or background Image in design time to none. I ran into this Properties Windows while changing the value of picturebox for my user control saying: Property value is not valid. Object reference not set to an instance of an object. This usercontrol is taken from another user control from a different project. Basically, we are reusing it.
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May 24, 2014
I have researched quite extensively, experimented, and still cannot seem to change the properties of a control on an active winform from a user control.
So I have a user control which populates each dynamically added tab page in a tab control.
I have a textbox in the user control which I would like to type in, capture the text_change event, and change the text of the label in the winform.
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Aug 19, 2014
how I could use a Image control where I can upload an image to a folder(done that) and then take that image right after uploading it (in the same line of code) view it on the image control...
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Apr 1, 2014
(C#, visual studio 2010, Windows Forms Application)
Ive set up one form that has two labels at the top (Western, Eastern). Below that I have a tabcontrol that contains two tabs (Sales, Products)
I have added four user controls:
WesternSales
WesternProducts
EasternSales
EasternProducts
The idea is that when you click on one of the labels (Western or Eastern) you access the tabs relevant to that region.
So, If i click on the "Western" label and then the "Sales" tab, the program loads the WesternSales usercontrol into the Sales tab. Likewise, if I click on the Eastern label and then the Sales Tab, the program loads the EasternSales usercontrol into the Sales tab, etc.
I want to eliminate the need for multiple data adapters. How can I load data from our database into each of the respective usercontrols using one data adapter?
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Aug 26, 2014
I am wondering what the best way would be for me to pass a piece of data between all of my different windows and user controls in my program.
Would i have to pass it separately between them e.g. add a piece of code into the button click event that will open the new window.
Or is there a way i can make it so that it is declared in the first window and then is accessible by all other windows and user controls.
Note: this is using WPF.
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Jan 5, 2015
I have followed the tutorial here - [URL] .....
This is a tutorial that I have gone through completely with success, but now I am trying to create a different project using the same sort of setup.
When I add my usercontrol to the MainWindow it has none of the buttons/TextBlocks on which I have put on the UserControls - It is just a blank box. What could be causing this?
I have changed the name of the project to [snip] because it has a company name in it...
"NumericControl.xaml"
<UserControl x:Class="[snip].UserControl.View.NumericControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
[Code] ....
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Dec 24, 2014
My assignment is to pixelate an image based on users input. I have a structure that stores the image, and in this structure I'm storing the height and width and a dynamic array of RGBA struct.
This is my function. my main issue (that I've found) is offsetting and figuring out a way to handle the "edge" if the dimensions don't add up to the set pixelation size.
// @------------- Pixelation X
bool filter_pixelation(float percentageX, float percentageY, Picture& pic) {
// URL
/* 50% of 80 = (50/100) * 80 = 40 */
size_t perX = percentageX * (float)pic.width;
size_t perY = percentageY * (float)pic.height;
[Code] ....
Here is the getIndex function:
int getIndex(int x, int y, int width) {
return y * width + x;
}
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Apr 29, 2015
Using C . I have been tasked (for a University assignment) to create a program that will enable a user to upload an image and convert that image into ASCII text using SDL on a Linux system. I've managed to open a window, display an image (non-selected) and convert it into grayscale using
case SDLK_g:
for (int y = 0; y < image->h; y++) {
for (int x = 0; x < image->w; x++) {
Uint32 pixel = pixels[y * image->w + x];
Uint8 r = pixel >> 16 & 0xFF;
Uint8 g = pixel >> 8 & 0xFF;
Uint8 b = pixel & 0xFF;
Uint8 v = (0.212671*r)+(0.715160*g)+(0.072169*B)/>;
pixel = (0xFF << 24) | (v << 16) | (v << 8) | v;
pixels[y * image->w + x] = pixel;
I am absolutely clueless as to how I can get the user to upload an image to the program and then begin the image -> ASCII conversion. I've found seem to be written in C++ or C# to make the conversion I should be using the GetPixelColour command?
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Feb 27, 2014
1.I wanted to create my own title bar in winform.
2.I have created for one form and i want to apply it for all form.
3.Are there any Styling winform package available for free.
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Feb 23, 2014
I have two Form Employee and Instructor, here Employee is super class of instructor.
public class Instructor: Employee
{
//Instructor class
}
I am able to access all property of Employee inside instructor class but with these some textbox and button design inside Employee design is also getting inherited inside Instructor design and i don want this and i want to maintain the parent-child relationship between Employee and Instructor.
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Apr 25, 2014
How do I bind a DATE column in a DataGridView Control to a DatePicker control (using C#)? I already have the DataGridView control bound to a database stored procedure which takes a DATE value as a parameter and selects joining table based on the results.
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Jul 29, 2014
So basically, I started out with each wizard == 1 winform, but then I found another way to do it by making the content of each wizard step a user control, then say, on initial deployment, it load usercontrol1, then when i click next, the panel hide usercontrol1 for usercontrol2 and so forth. Would it be feasible to create all usercontrols (all the wizard step) and add them in an array, then i can load them by index?
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Jun 18, 2014
I have a main WinForm that I want to press a hotkey and show and hide the form. I can press Insert and hide the form and I see its icon in my Win7 task bar but when I press Insert again it doesn't show. Is my coding logic wrong to make it work? Maybe when its hidden the Insert key isn't being 'seen'? Although the code I am using I got somewhere on the internet that says it will work at the app level.
virtual bool PreFilterMessage(Message% m) {
// Detect key down messages.
if (m.Msg == WM_KEYDOWN) {
Keys keyCode = (Keys)((int)m.WParam) & Keys::KeyCode;
[Code] ....
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Jun 18, 2014
I made a winForm with a button on it in the Designer (VS 2010 C++).
But when I run my app, the button does not show on the form.
The button visible property is set to true.
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Apr 22, 2014
I hav created mdi parent form that contain one user control. I want to access that user control from one of the child form
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Nov 11, 2014
I have the following code. I have hardcoded the x and y values to test. And for some reason for the point (0,-0.5) it plots (1,-0.5) . What is going on, because if you try other values then the graph displays correctly.
foreach (var grp in q) {
point = new DataPoint();
Sum1 = grp.Sum1 > 2 ? 2 : grp.Sum1;
Sum1 = Sum1 < -2 ? -2 : Sum1;
[Code] ....
Attached is what is displayed.
Attached image(s)
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Dec 24, 2012
How do I count the objects(for example botton) on the form
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Aug 20, 2013
I was created winform application with sql data base, after i created it i was converted to the installer file,for the other users but when they run the application did not connect to the database, how i fix this stuff...?
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Jul 3, 2014
Im trying to compare the image of a button to another image in Visual Studio like so...
//variables
Image active = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\active.png");
Image stunned = Image.FromFile("C:\Users\Ethan\Desktop\StarWars Status\stunned.png");
[Code]...
btnStatusPlr1.Image SHOULD come back as True.Then I realized it might not be the same as setting the buttons image in the properties (Which is what i did to get the original image (the one being compared to))
I do have a feeling ive done something wrong here (Yes im a noob /> )
Variable active, is the same image as the buttons default (Well should be)
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Aug 4, 2014
i've taken a couple courses in C Programming and all of the assignments were pretty basic. I've been looking into some of the awesome things that people have been doing with the Raspberry Pi and noticed that some of them are using the C language to control robotic arms and LEDs. I skim the code for some of these projects and notice they are using header files and code that i have never seen, nor are they in the books that i have. for example:
#include <fcntl.h>
#include <sys/mman.h>
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Mar 5, 2013
how to control usb ports in visual studio C++?
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Aug 23, 2013
I am using MFC (and a newbie here) and I want to retrieve values of my control array.
How can I possibly do that? This is my ControlArray
Code:
m_EditArray[0]=GetDlgItem(IDC_EDIT1);
m_EditArray[1]=GetDlgItem(IDC_EDIT2);
m_EditArray[2]=GetDlgItem(IDC_EDIT3);
m_EditArray[3]=GetDlgItem(IDC_EDIT4);
m_EditArray[4]=GetDlgItem(IDC_EDIT5);
m_EditArray[5]=GetDlgItem(IDC_EDIT6);
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Jun 11, 2012
is there a way to tell WPF that I'm going to do a lengthy update on a control (TextBlock), and that it shouldn't redraw it until I tell it I'm done? I'm adding a large number of items to the Inlines property, and it has to redraw the entire control every time I add an item, which takes a very long time - about 1 second for every 100 items. I know some other frameworks allow freezing of certain controls, but I haven't been able to find anything in the documentation or on google. I've tried collapsing the TextBlock, and then making it visible again after the update, but it did not improve the performance at all.
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Nov 11, 2013
I've to use SIGNALS to control threads. Here's my code without the use of signals as I'm no good at that
Code:
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
}
[code]....
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Jan 28, 2013
How do I add files to a tree control. I have all the directory and sub directorys ..need the files to
Heres the code
CFileFind fd ;
if ( path.Right ( 1 ) != "" )
path += "" ;
path += "*.*" ;
BOOL found ;
found = fd.FindFile ( path ) ;
[Code] .....
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Feb 22, 2013
I am running some simulation, in which i need to control the iterator of a multimap, like
multimap<double, int> mapp;
......
int n=6;
for(int i=0; i<5; i++) {
for(auto it = mapp.begin()+i*n; it!=mapp.begin()+(i+1)*n; it++) {
......
However this way of controlling is not possible for multimap. Why and how the make it work? Do I need to overload the operator +?
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