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  • Autoscale Font in a TextBox Control so that its as big as possible and still fits in text area bound

    - by blak3r
    I need a TextBox or some type of Multi-Line Label control which will automatically adjust the font-size to make it as large as possible and yet have the entire message fit inside the bounds of the text area. I wanted to see if anyone had implemented a user control like this before developing my own. Example application: have a TextBox which will be half of the area on a windows form. When a message comes in which is will be approximately 100-500 characters it will put all the text in the control and set the font as large as possible. An implementation which uses Mono Supported .NET libraries would be a plus. Thanks in advance. If know one has implemented a control already... If someone knows how to test if a given text completely fits inside the text area that would be useful for if I roll my own control. Edit: I ended up writing an extension to RichTextBox. I will post my code shortly once i've verified that all the kinks are worked out.

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  • How to know there is something in the cell or not ?

    - by Harikrishna
    I have table like below in the html file: <table border="1"> <tr> <td>BuyQuantity</td><td>SellQuantity</td> </tr> <tr> <td>15D</td><td>&nbsp;<span style="font-family: &quot;Arial Unicode MS&quot;;"><o:p></o:p></span></p></td> </tr> <tr> <td>&nbsp;<span style="font-family: &quot;Arial Unicode MS&quot;;"><o:p></o:p></span></td><td>38D</td> </tr> <tr> <td>&nbsp;<span style="font-family: &quot;Arial Unicode MS&quot;;"><o:p></o:p></span></td><td>99D</td> </tr> <tr> <td>38D</td><td>&nbsp;<span style="font-family: &quot;Arial Unicode MS&quot;;"><o:p></o:p></span></td> </tr> </table> There are two columns: buy-quantity and sell-quantity.(It is only example but in each html file there is different content in the table.) Now with the content of these two columns I want to decide there is items bought or items sold.Like in the first row there is 15d buy-qauntity then items were bought and in the second row there is 38d sell-qauntity then items were sold and so on. And after deciding there is items-bought or items-sold I want to build one column named buy/sell for this table like below: ![alt text][1] [1]: http://C:\Documents and Settings\Administrator\My Documents\My Pictures\untitled.png How can I do this ?

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  • how to check some assembly is present in client and register that if not.

    - by Jimmy
    hi there, what i wana know is that how can i use assembly that is register in GAC in my C# application. Detail: What i wana achieved is that 1) Check ABC assembly that is register in my client machine or not from my windows application 2) If not then register that assemble in GAC of client from my windows application 3) And use this assembly and perform some functions Remember that that ABC assemble is my assembly having some of my function.

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  • Creating Settings form using TreeView in C#

    - by Kiran Chandrashekhar
    I am developing the settings form for the software developed in C#. I was looking at how different software have implemented their settings form. In most of the cases that I came across, they seem to be using Treeview on the left pane of the form and configuration settings on the right pane. Ref URL : http://2.bp.blogspot.com/-nMfQoLurxwM/UDXfiZKd4DI/AAAAAAAAAME/IRf6kmxay4w/s1600/bild1.jpg I was wondering, how the different controls are designed/displayed on the right pane. Do they hide all the controls depending which node is selected in the TreeView something like this : if (treeView1.SelectedNode == treeView1.Nodes[0]) { this.groupBox1.Visible = true; this.button1.Visible = true; this.textBox1.Visible = true; this.textBox2.Visible = true; this.label1.Visible = true; this.label2.Visible = true; this.label3.Visible = true; } else { this.groupBox1.Visible = false; this.button1.Visible = false; this.textBox1.Visible = false; this.textBox2.Visible = false; this.label1.Visible = false; this.label2.Visible = false; this.label3.Visible = false; this.groupBox2.Visible = true; this.button2.Visible = true; this.textBox3.Visible = true; this.textBox3.Visible = true; this.labe4.Visible = true; this.label5.Visible = true; this.label6.Visible = true; // bool success = selectColor(); } Is my understanding correct ? Or do we have a better design approach for creating a settings form. Thanks

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  • How do I close a form when the ESC key was hit, but only if no Control handled it?

    - by Gabriel
    I have a Form that closes itself when the ESC key is pressed, thanks to KeyPreview, ProcessKeyEventArgs, ProcessCmdKey or whatever. But I have a Control on that form that does very relevant things when ESC is pressed (it hides itself) and the Form should not be closed when that happens. The control uses the KeyDown event and sets the SuppressKeyPress flag to true, but that happens after the aforementioned form key preview, thus having no effect. Is there some sort KeyPostview ? How do I not close the form when a Control has a relevant use of a key hit ? Edit: The control handling ESC is a textbox embedded in a hand-maid ListView. The textbox appears when the user clicks a cell, enabling edition. To validate the new text, ENTER would be nice (that already works, as giving the focus to anything else). To cancel edition, ESC seems most natural.

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  • OnPaint event during a callback when the form is below?

    - by Martín Marconcini
    Imagine the following scenario: this.SetStyle(ControlStyles.UserPaint, true); //this doesn’t change anything … void OpenSomeForm() { SomeForm sf = new SomeForm(); sf.SomeEvent += new … (SomeEventOcurred); sf.ShowDialog(); } private void SomeEventOcurred(…) { OnePanelInThisForm.Invalidate(); } private void OnePanelInThisForm_Paint(object sender, PaintEventArgs e) { DoSomeDrawing(e.Graphics); } Now, OnePanelInThisForm draws correctly when the form loads. But if SomeEventOcurred is Fired from “SomeForm”, the paint event is not fired. If I close and reopen the form it correctly repaints. If I add a button to the form that executes: OnePanelInThisForm.Invalidate(); the panel is correctly repaint. What am I missing?

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  • Propagate properties to parent control C#

    - by Martin Ch
    Is there any way how to propagate properties from child control into parent - so I can access property like - Parent.Property1 instead of Parent.Child.Property1 ? I cant use inheritance - my parent cant be extended child type - its inherited from different class. Also I dont wanna add code for each property from child to parent like: public object Property1 { get{ return Child.Property1; } set{ ChildProperty1 = value; } } Maybe using reflection - something like this? public PropertyInfo[] Properties { get{ return Child.GetType().GetProperties(); } set{ Child.GetType().GetProperties().SetValue() = value.GetValue()} } Thanks

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  • Preventing ListBox scrolling to top when updated

    - by WDZ
    I'm trying to build a simple music player with a ListBox playlist. When adding audio files to the playlist, it first fills the ListBox with the filenames and then (on a separate thread) extracts the ID3 data and overwrites the filenames with the correct Artist - Title information (much like Winamp). But while the ListBox is being updated, it's unscrollable, as it always jumps to the top on every item overwrite. Any way to prevent this? EDIT: The code: public Form1() { //Some initialization code omitted here BindingList<TAG_INFO> trackList = new BindingList<TAG_INFO>(); // The Playlist this.playlist = new System.Windows.Forms.ListBox(); this.playlist.Location = new System.Drawing.Point(12, 12); this.playlist.Name = "playlist"; this.playlist.Size = new System.Drawing.Size(229, 316); this.playlist.DataSource = trackList; } private void playlist_add_Click(object sender, EventArgs e) { //Initialize OpenFileDialog OpenFileDialog opd = new OpenFileDialog(); opd.Filter = "Music (*.WAV; *.MP3; *.FLAC)|*.WAV;*.MP3;*.FLAC|All files (*.*)|*.*"; opd.Title = "Select Music"; opd.Multiselect = true; //Open OpenFileDialog if (DialogResult.OK == opd.ShowDialog()) { //Add opened files to playlist for (int i = 0; opd.FileNames.Length > i; ++i) { if (File.Exists(opd.FileNames[i])) { trackList.Add(new TAG_INFO(opd.FileNames[i])); } } //Initialize BackgroundWorker BackgroundWorker _bw = new BackgroundWorker(); _bw.WorkerReportsProgress = true; _bw.DoWork += new DoWorkEventHandler(thread_trackparser_DoWork); _bw.ProgressChanged += new ProgressChangedEventHandler(_bw_ProgressChanged); //Start ID3 extraction _bw.RunWorkerAsync(); } } void thread_trackparser_DoWork(object sender, DoWorkEventArgs e) { BackgroundWorker _bw = sender as BackgroundWorker; for (int i = 0; i < trackList.Count; ++i) { //Pass extracted tag info to _bw_ProgressChanged for thread-safe playlist entry update _bw.ReportProgress(0,new object[2] {i, BassTags.BASS_TAG_GetFromFile(trackList[i].filename)}); } } void _bw_ProgressChanged(object sender, ProgressChangedEventArgs e) { object[] unboxed = e.UserState as object[]; trackList[(int)unboxed[0]] = (unboxed[1] as TAG_INFO); } EDIT2: Much simpler test case: Try scrolling down without selecting an item. The changing ListBox will scroll to the top again. using System; using System.Windows.Forms; namespace WindowsFormsApplication1 { public class Form1 : Form { private System.ComponentModel.IContainer components = null; protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.listBox1 = new System.Windows.Forms.ListBox(); this.timer1 = new System.Windows.Forms.Timer(this.components); this.SuspendLayout(); // listBox1 this.listBox1.FormattingEnabled = true; this.listBox1.Location = new System.Drawing.Point(0, 0); this.listBox1.Name = "listBox1"; this.listBox1.Size = new System.Drawing.Size(200, 290); // timer1 this.timer1.Enabled = true; this.timer1.Tick += new System.EventHandler(this.timer1_Tick); // Form1 this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(200, 290); this.Controls.Add(this.listBox1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } private System.Windows.Forms.ListBox listBox1; private System.Windows.Forms.Timer timer1; public Form1() { InitializeComponent(); for (int i = 0; i < 45; i++) listBox1.Items.Add(i); } int tickCounter = -1; private void timer1_Tick(object sender, EventArgs e) { if (++tickCounter > 44) tickCounter = 0; listBox1.Items[tickCounter] = ((int)listBox1.Items[tickCounter])+1; } } static class Program { [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } }

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  • Setting SqlParameter value automatically with DataGridView?

    - by johansson
    Is there a way to set a SqlParameter's value with DataGridView, if data-bound? For example: SqlCommand selCmd = CreateCommand("SELECT * FROM table1"); SqlCommand updCmd = CreateCommand("UPDATE table1 Set column1 = @column1 WHERE id = @id"); updCmd.Parameters.Add(new SqlParameter("column1"), SqlDbTypes.Int)); updCmd.Parameters.Add(new SqlParameter("id", SqlDbTypes.Int)); SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand = selCmd; da.UpdateCommand = updCmd; da.Fill(_dataTable); dgv.DataSource = _dataTable; Then somewhere later: da.Update(); How can I make sure it's getting the right column1 value that was edited and the right id for the row for the da.Update(); to work, otherwise it complains that I have not provided the value. Or if there's a better way, please advise. Thanks!

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  • how to put a value to an array when a checkbox is checked? c#?

    - by Jan Darren Noroña
    I am making a random character generator, i have 2 forms, form1 and form2, on my form2 i have the checkboxes there, so if the user checked checkbox1, on my form1 it will only display 1 character, now if the user check all 5 checkboxes, my form1 will generate 5 characters. i have a button on form1 that will trigger an event on generating random characters. characters: '+','-','*','/','%' how will my code be? I am using WINDOWS FORMS APPLICATION. pics here: form1: http://i49.tinypic.com/30bzos8.png form2: http://i50.tinypic.com/k00ndt.png char[] select = new char[] { '+' , '-' , '*' , '/', '%' }; var rand = new Random(); char num = select[rand.Next(5)];

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  • What is the most efficient way to delete all selected items in a ListViewItem collection

    - by Andrew
    My user is able to select multiple items in a ListView collection that is configured to show details (that is, a list of rows). What I want to do is add a Delete button that will delete all of the selected items from the ListViewItem collection associated with the ListView. The collection of selected items is available in ListView.SelectedItems, but ListView.Items doesn't appear to have a single method that lets me delete the entire range. I have to iterate through the range and delete them one by one, which will potentially modify a collection I'm iterating over. Any hints? Edit: What I'm basically after is the opposite of AddRange().

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  • Organising UI code in .NET forms

    - by sb3700
    Hi I'm someone who has taught myself programming, and haven't had any formal training in .NET programming. A while back, I started C# in order to develop a GUI program to control sensors, and the project has blossomed. I was just wondering how best to organise the code, particularly UI code, in my forms. My forms currently are a mess, or at least seem a mess to me. I have a constructor which initialises all the parameters and creates events. I have a giant State property, which updates the Enabled state of all my form control as users progress through the application (ie: disconnected, connected, setup, scanning) controlled by a States enum. I have 3-10 private variables accessed through properties, some of which have side-effects in changing the values of form elements. I have a lot of "UpdateXXX" functions to handle UI elements that depend on other UI elements - ie: if a sensor is changed, then change the baud rate drop down list. They are separated into regions I have a lot of events calling these Update functions I have a background worker which does all the scanning and analysis. My problem is this seems like a mess, particularly the State property, and is getting unmaintainable. Also, my application logic code and UI code are in the same file and to some degree, intermingled which seems wrong and means I need to do a lot of scrolling to find what I need. How do you structure your .net forms? Thanks

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  • How can I move app.config to a different folder inside the Solution Explorer?

    - by Coder7862396
    I'm using Visual Studio 2010. In my Solution Explorer I like to sort my Project items into folders (a folder for Forms, a folder for Classes, a Misc folder, etc.) It seems though that if I move the "app.config" file to a folder named "Config Files" everything works until I change a setting in the Settings.settings file. Once I do that, a new app.config is created and the one that was in the "Config Files" folder did not get updated. I have searched the entire solution for the text "app.config" and did not find any results. How can I move this file so that my Solution Explorer looks nice and clean?

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  • How to Solve this Error "Cannot convert lambda expression to type 'string' because it is not a deleg

    - by peace
    . I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue Can you please advice. Employee emp = new Employee(); comHandledBySQt.DataSource = from x in emp.GetDataFromTable("1") select new { x.Id, Name = x.FirstName + " " + x.LastName }; comHandledBySQt.DisplayMember = "Name"; comHandledBySQt.ValueMember = "Id"; Above code should displays drop list of employees first name and last name in a combo box

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  • How to detect Help button press in Windows Forms MessageBox?

    - by sashaeve
    I have a message box with 3 buttons: Yes, No, Help: var result = MessageBox.Show("text", "title", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1, true); I can detect if Yes/No buttons where clicked something like this: if(result == DialogResult.Yes) // some actions How I can detect that Help button was pressed and execute my own code?

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  • What, if any, printable character did a user type based on the values in a given System.Windows.Form

    - by Corey Trager
    As a workaround for a problem, I think I have to handle KeyDown events to get the printable character the user actually typed. KeyDown supplies me with a KeyEventArgs object with the properities KeyCode, KeyData, KeyValue, Modifiers, Alt, Shift, Control. My first attempt was just to consider the KeyCode to be the ascii code, but KeyCode on my keyboard is 46, a period ("."), so I end up printing a period when the user types the delete key. So, I know my logic is inadequate. (For those who are curious, the problem is that I have my own combobox in a DataGridView's control collection and somehow SOME characters I type don't produce the KeyPress and TextChanged ComboBox events. These letters include Q, $, %.... This code will reproduce the problem. Generate a Form App and replace the ctor with this code. Run it, and try typing the letter Q into the two comboxes. public partial class Form1 : Form { ComboBox cmbInGrid; ComboBox cmbNotInGrid; DataGridView grid; public Form1() { InitializeComponent(); grid = new DataGridView(); cmbInGrid = new ComboBox(); cmbNotInGrid = new ComboBox(); cmbInGrid.Items.Add("a"); cmbInGrid.Items.Add("b"); cmbNotInGrid.Items.Add("c"); cmbNotInGrid.Items.Add("d"); this.Controls.Add(cmbNotInGrid); this.Controls.Add(grid); grid.Location = new Point(0, 100); this.grid.Controls.Add(cmbInGrid); }

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  • Best free Windows Forms validator control

    - by Salar
    What is the best free Windows Forms validator control. I want to use it in a free (and maybe open-source) project. I know these: ValidationProvider Control not working in VS2010 DXValidationProvider works only for devexpress controls. Supervalidator from DevComponents meets my needs but it isn't free. here is a picture of it:

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  • Mvp View knows Model

    - by userbb
    I'm trying to use MVP and I notice that my View must know Model that should not happen in MVP I presume. here is example: public partial class TestForm : Form, ITestPresenter { public void LoadList(IEnumerable<AppSignature> data) { testPresenterBindingSource.DataSource = data; } } public interface ITestPresenter { event EventHandler<EventArgs> Load; void LoadList(IEnumerable<AppSignature> data); } and the problem is that in TestForm I need reference to AppSignature. In all tutorials I saw, there are some simple examples like public void LoadList(IEnumerable<String> data) where there is no need reference to model. But how i.e DataGridView can publish current row data?

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  • C# drawing and invalidating 2 lines to meet

    - by BlueMonster
    If i have 2 lines on a page as such: e.Graphics.DrawLine(blackPen, w, h, h, w); e.Graphics.DrawLine(blackPen, w2, h2, h2, w2); how would i animate the first line to reach the second line's position? I have the following method which calculates the distance between two points (i'm assuming i would use this?) public int Distance2D(int x1, int y1, int x2, int y2) { // ______________________ //d = &#8730; (x2-x1)^2 + (y2-y1)^2 // //Our end result int result = 0; //Take x2-x1, then square it double part1 = Math.Pow((x2 - x1), 2); //Take y2-y1, then sqaure it double part2 = Math.Pow((y2 - y1), 2); //Add both of the parts together double underRadical = part1 + part2; //Get the square root of the parts result = (int)Math.Sqrt(underRadical); //Return our result return result; } How would i re-draw the line (on a timer) to reach the second line's position? I've looked a lot into XAML (story-boarding) and such - but i want to know how to do this on my own. Any ideas? I know i would need a method which runs in a loop re-drawing the line after moving the position a tid bit. I would have to call Invalidate() in order to make the line appear as though it's moving... but how would i do this? how would i move that line slowly over to the other line? I'm pretty sure i'd have to use double buffering if i'm doing this as well... as such: SetStyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true); This doesn't quiet work, i'm not quiet sure how to fix it. Any ideas? protected override void OnPaint(PaintEventArgs e) { Distance2D(w, h, w2, h2); if (w2 != w && h2 != h) { e.Graphics.DrawLine(blackPen, (w * (int)frame), (h * (int)frame), (h * (int)frame), (w * (int)frame)); e.Graphics.DrawLine(blackPen, w2, h2, h2, w2); } else { t.Abort(); } base.OnPaint(e); } public void MoveLine() { for (int i = 0; i < 126; i++) { frame += .02; Invalidate(); Thread.Sleep(30); } } private void button1_Click(object sender, EventArgs e) { t = new Thread(new ThreadStart(MoveLine)); t.Start(); }

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  • Weird <T> Activator Question.

    - by j-t-s
    Hello, I'm sorry, but a while ago I wrote a piece of code that was so nice. And now I'm trying to remember it for a new project. All I can remember about it is that it looked something like this: public static Create<T>() *something missing here* : *Something missing here* { // add methods etc here. I also think I remember something like " Activator.CreateInstance" being used. But I'm not sure. } Has anybody written code like this before? Basically what it did was it created a control and passed it back to another project. Thank you jt

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  • Creating a Programming Language

    - by Lucifer
    Don't worry, I'm not going to ask that question, yet again... I am wanting to create my own programming language, just for learning sake. I don't want anything other than possibly a few links to head me into the right direction. MSDN Documentation on C# that is specific to what is required to create a language would be great! For the time being, all I am wanting to create is a very simple language that allows me to Create a Form, add a control to it, give that control a location, and maybe even some properties like a Text property, or maybe even a Color property. That's it! Any help / advice at all is greatly appreciated! Thank you :)

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