panel | 易学教程

How to detect if WinForms Panel has scrolled to the end?

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问题 I am developing a WinForms application in which there is a panel which contains some user-controls. When the panel loads for the first time it shows 10 user controls. But when it is scrolled down completely it should load and append more user controls at the end of the panel. I am trying to achieve this using this code: private void topicContainer_Scroll(object sender, ScrollEventArgs e) { if (e.NewValue== topicContainer.VerticalScroll.Value) MessageBox.Show("Topics load here"); } Its just a

How to create dynamically C# panels

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问题 I create a contact manager. The user can already enter some and they are stored in a file and re-opened when the program is started. Each contact is an object of my Person class. When launching the program (in Load()) I created a for loop until all contacts have been explored (contacts are stored when opened in a Person table) So now I come to my problem: I have a panel that is scrollable (I have enabled the option) and I would like every 50 pixels in height, that a new panel is created with

Maintain a controls Aspect Ratio on Resize

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问题 I have a panel control with a picture box in it. How can I maintain the aspect ratio of the panel control when Resizing the form it's on? 回答1: You'll need to store off the aspect ratio somehow, whether it's something known to you at design time or if you just want to calculate it in the constructor of the form after InitializeComponent() . In your form's Resize event, you'll just need to set the size of the Panel to be the largest rectangle at that aspect ratio that fits within the

Storing Textbox values into Database

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问题 I am doing a crossword puzzle and i have 100 text boxes in a panel like this : Every text box have an id of 00 - 99 since there is 100 of it . First Row will have an id 00-09 , 2nd row will have an id of 10-19 and so on. When user types something in some text box will be null and some text box will have values in it. How do I save values from a text box of a certain id to a database? For example the above image, HELP , text box id of 22 will have the value H , id of 23 will have the value of

C# List of Panels

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问题 I would like to create panels with detailed information regarding an item (including a thumbnail image on the left hand side) and then add these to a scrollable list. Much like how iTunes on the iPhone displays the lists of applications available. I have done some searching but have thus far been unable to find any assistance. Does anyone have any ideas or links to samples they would like to share with me. Thanks in advance, Rob 回答1: In sum, the following creates a series of panels within a

wpf devexpress

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背景 winform切为wpf，使用devexpress插件参考的网站为： https://docs.devexpress.com/WPF/7875/wpf-controls 1.GridControl行号设置这里主要有两个问题，一个是行号要从1开始，二是行号这一列的行宽设置（默认行宽到100后，数字就显示不全了）行宽是IndicatorWidth 属性，行号是RowIndicatorContentTemplate 实现 <dxg:TableView ShowGroupPanel="False" Name="gvTable" IndicatorWidth="50" RowIndicatorContentTemplate="{StaticResource rowIndicatorContentTemplate}"/> <DataTemplate x:Key="rowIndicatorContentTemplate"> <StackPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch"> <TextBlock Text="{Binding Path=RowHandle.Value,Converter={StaticResource rowIndicatorConverter}}" TextAlignment=

How do I create dynamic panel to be shown and hide using difference choices in combo box in C#?

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问题 I want to make a GUI which is dynamic, meaning that the GUI will change depending on the choice which user makes on the combo box. For example, if combo box consists of {English, Spanish, French}, the panel on the bottom of the combo box will change its description language depending on the choice. To do this, I believe I have to do something like clear panel then redraw panel, but I have no idea how. Can someone tell me how to make this happen in details on Visual Studio 2005 C#? Thank you

How to fires event after Drag & Drop on TreePanel

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问题 How can I use Ext.tree.ViewDDPlugin's events? I have a TreePanel that uses DDPplugin, but I'd like to know how to listen to the drop event. This is what my code looks like: var monPretree = Ext.create('Ext.tree.Panel',{ id : 'treepanel', title : 'TITRE', //width : 800, //height : 600, width : 500, enableDD: true, useArrows : true, viewConfig : { plugins : { ptype: 'treeviewdragdrop', appendOnly: true, listeners: { drop: function (node, data, overModel, dropPosition) { alert('CHANGE'); },

How to add a color key to a pairs() plot?

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问题 Goal: I have an adjusted pairs plot in R and I would like to add a color key to it. The panel backgrounds in the pairs plot show certain colors determined from a matrix of numbers. I would like to have a color key to the right of the pairs plot which shows these colors and some labels indicating the numbers. I found some ways how to add color keys to image() plots (for example, image.plot in the fields package; colorbar in the matlab package; color.legend in the plotrix package). So, in

Draw Transparent Panel without Being Black by Form Minimization

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问题 I'm drawing a panel on a bitmap in picturebox using C#. I used below code, which is fine when I don't minimize the Form. When I minimize the Form and again maximize it to the first size, all panels which were drawn by this class, show black background. I found that when I change ControlStyles.Opaque to something else such as "SupportsTransparentBackColor" the problem would be fixed but the panels would not be transparent anymore. public class ExtendedPanel : Panel { private const int WS_EX