How can I acces drag-and-drop buttons by String in a loop?

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I am working on a desktop application which includes graphic scheme and that scheme has 50 drag-and-drop buttons(they are not dynamically allocated) they are all named similar(for example button 1 is btnP1, button 2 is btnP2 etc...). I would like to access those buttons with a for loop using string, I checked some previous posts on this site but none of those answers helped my problem.

I wrote 50 lines of codes to add those buttons to controls, and the same moment I add them to the controls they disappear from the graphic scheme. Later I tried to access them through for loop, but nothing happened, since they disappear once I add them to the controls..

        this.Controls.Add(btnP1);
        this.Controls.Add(btnP2);
        this.Controls.Add(btnP3);
        this.Controls.Add(btnP4);
        ... and so on
        this.Controls.Add(btnP47);
        this.Controls.Add(btnP48);
        this.Controls.Add(btnP49);
        this.Controls.Add(btnP50);

for(int i = 1; i <= 50; i++)
{
this.Controls["btnP"+ i.ToString()].Visible= False;
}

I would like to find out if there is some other way to access my buttons, because I need them to be shown and hidden.


To loop over all buttons within one control you can use a foreach loop

foreach(Button btn in this.Controls.OfType<Button>())
{
   btn.Visible = false; //every button in you Control
}

With this code lines you run through the entire Control.

With the OfType method you filter only the buttons out of the control. So you prevent an InvalidCastException error.

Enumerable.OfType

Alice 2.0: Introductory Concepts and Techniques, Drag a copy of the Loop tile from the bottom of the Editor area and drop it in Select other, then enter 100 in the Custom Number dialog box and click the Okay button. However, the loop index is a number but the say command uses strings​. Figure 1 – Drag and Drop from a list box to a text box. Just to be perfectly clear, I’m talking about dragging and dropping data, not the controls themselves. That means that some controls aren’t conducive to drag-and-drop. For example, you can’t drag a Command button or a Toggle button.


Similar to Mario's answer but I would probably expand the selectors if their naming is consistent and filter out ones that can't be dropped:

        foreach (Button btn in this.Controls.OfType<Button>().Where(x => x.Name.StartsWith("btnP") && x.AllowDrop))
        {
            btn.Visible = false;
        }

Drag and Drop in Access, Doug Steele shows you how to add drag-and-drop to your Access application That means that some controls aren't conducive to drag-and-drop. One solution is to concatenate each of the selected entries from the list box into a single string In this code, if DragCtrl is a list box with more than one row selected, I loop  Moreover, drag-and-drop can be implemented between a JavaFX application and a third-party (native) application such as Windows Explorer or a desktop. A drag-and-drop gesture happens as follows: The user click a mouse button on a gesture source, drags the mouse, and releases the mouse button on a gesture target.


LINQ version:

this.Controls
.OfType<Button>()
.Where(b => b.Name.StartsWith("btnP") && b.AllowDrop)
.ToList()
.ForEach(b => b.Visible = false);

Android Application Development All-in-One For Dummies, In fact, Eclipse's Graphical Layout has the same kinds of drag-anddrop With Eclipse's Graphical Layout, you have access to most of the Android SDK features. To store, the extra data, you can use SetGenericData, which you can use to store any object you want. I added the CustomDragData class to the end of the file, which simply holds public references. This object is then stored in a hash table in DragAndDrop, which you can later access using GetGenericData.


How to use the Drag and Drop API, Using the Drag and Drop API you can define which elements in the page are which this time is set by the user through the use of modifier keys. We can edit it in a dragenter or dragover event, to one of those string values: you can iterate using a loop and get access to each DataTransferItem object. You can drag and drop the Hero component onto the CQ page. If the CQ sidekick is empty, you can populate it by clicking the Design button located at the bottom of the sidekick. Next click the Edit button that appears and select Hook from the list of categories that appear as shown here.


4.3. Loops and Strings, In this lesson, we will write our own loops to process strings. Remember Drag the blocks from the left area into the correct order in the right area. Click on the "​Check Me" button to check your solution. Arrow keys to Drop blocks here. Check Alternatively, you can apply a style for the button, which works in a manner similar to HTML styles to define multiple style properties such as the background, font, size, and others. For more information about applying styles, see Styles and Themes. Borderless button. One design that can be useful is a "borderless" button.


The Power in Logic Pro: Songwriting, Composing, Remixing, and , The Full View of the Step Grid Click on the Full View button in the lower right of the screen to enable Full View. Grab any one of the Vocal Apple Loops that appeals to you. Power Tip: Empty Kit to Load Sampler Instruments There is a DragandDrop sample kit that is not only emptied of any of the String The EQ or Body. When building SQL strings. In all of these instances, Access must pass a string to the Access database engine. When you specify a criteria argument for a domain aggregate function, for example, Access must evaluate any variables, concatenate them into a string, and then pass the entire string to the Access database engine.