Questions tagged as 'winforms'

Tagged questions
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CheckBox with External CheckBox

I have a Form with a DropDownlist with CheckBox inside, and I have an external CheckBox that selects and unchecks all. My question is the following. When I unselect one of the items in the DropDown the "Select All" CheckBox should be unche...
asked by 04.08.2015 / 15:38
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Combobox.Items not being updated

I'm creating a combobox in runtime and trying to manually set a% of 'default'%, but I realized that even setting a value inside the combo manually is not selected. p> I already checked if the data type beats (both are SelectedValue )....
asked by 01.07.2015 / 19:43
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Panoramic image in C # Windows Forms

I'm doing a new project using C # windows forms, and needed to open a panoramic image and rotate it just horizontally. I looked for some examples on the internet, but found none that is clear. Someone has some example that can help me.     
asked by 25.11.2014 / 19:35
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Performance while drawing an image

I currently use the DrawImage method of the Graphics class. However, the drawing speed in the components is very slow. How can I optimize its use? Can libraries like MonoGame or OpenTK perform better on this? Here is an example of code in...
asked by 07.07.2015 / 14:51
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Write ComboBox C # values in the database instead of descriptions

I have a screen in a simple registry form, where it has some combobox. I set your values manually. EX; In a combo that will register the access profile of a user, I have in this combo the option 1- Limited, 2 - total. However, how do I make t...
asked by 20.02.2017 / 00:44
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How do I use the F2 key to open another form?

I have the following code, but it enabled the ENTER (13) key to open the form, I would like to enable F2 , I already looked for ASCII tables everywhere and can not find the desired code. private void Form1_KeyPress(object sender, KeyPressEv...
asked by 23.09.2015 / 13:20
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Change preview text (Xtrareport)

I would like to change the text of Preview of a report Xtrareport . See image below:     
asked by 03.03.2015 / 15:33
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How to use HasMorePages on this occasion?

Well, I have a printing system here that is working perfectly. The problem I'm facing is regarding the use of bool HasMorePages . I'm not sure how to implement it to print multiple pages if the content does not fit into one. Take a look at...
asked by 23.11.2014 / 02:40
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Error 501 when connecting to FTP

I have a C # (Windows Forms) application that accesses the company's FTP to download some files and / or upload. Only, on two specific clients, the application can not access FTP. It gives the following error:    The remote server returned...
asked by 24.11.2014 / 18:26
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Manipulating TextBox

Simply fill in the fields Modelo , Placa , Km and this will be saved in the multiline fields below: ButwhenIclickthe"Save" button, the result is completely opposite to what you expected. I wanted each field to be one ahe...
asked by 25.01.2018 / 20:04