.NET GENES

Assuming you already get the pointer handle of the textbox/richtextbox control from source calling function, the snippet to get the content of the edit control is as follows. public const int GWL_ID = -12; public const int WM_GETTEXT = 0x000D; [DllImport("User32.dll")] public static extern int GetWindowLong(IntPtr hWnd, int index); [DllImport("User32.dll")] public static extern IntPtr SendDlgItemMessage(IntPtr hWnd, int IDDlgItem, int uMsg, int nMaxCount, StringBuilder lpString); [DllImport("User32.dll")] public static extern IntPtr GetParent(IntPtr hWnd); private StringBuilder GetRichEditText(IntPtr hWndRichEdit) { Int32 dwID = GetWindowLong(hWndRichEdit, GWL_ID); IntPtr hWndParent = GetParent(hWndRichEdit); StringBuilder title = new StringBuilder(128); SendDlgItemMessage(hWndParent, dwID, WM_GETTEXT, 128, title); return title; } Greg

A question was raised on vbforums on how to invoke click a button using WPF webbrowser control. This sample loads google.com page and writes a sample text on the textbox and then invoking the click button. HTMLDocument document = (HTMLDocument)wbGetHost.Document; foreach (IHTMLElement myelem in document.getElementsByTagName( "input" )) { if (myelem.id != null ) { if (myelem.id.Equals( "lst-ib" ) && myelem.className.Equals( "lst lst-tbb" ) && !document.documentElement.innerHTML.ToLower().Contains( "wikipedia" )) { HTMLInputElement el = myelem as HTMLInputElement; el. value = "Bill Gates" ; HTMLInputElement searchButton = (HTMLInputElement)document.all.item( "btnK" , 0); searchButton.click(); break ; } } } Greg

In an application using Controller factory, i encountered an error as stated in the title. My MVC does not have a favicon.ico. The solution is to add a parameter constraint that does not allow .ico filenames in your routes. I got the solution from forums.asp.net routes.MapRoute( "Default" , // Route name "{controller}/{action}/{id}" , // URL with parameters new { controller = "ProductView" , action = "Index" , id = "" }, // Parameter defaults new { controller = @"[^\.]*" } // Parameter constraints (regex/string expression) );

Here's a query to count number of repeating records based from union all query. Union all query does not remove duplicate records. Here's a sample script: select resultsduplicate.url as job_item, count (resultsduplicate.url) as repeat_occurence from ( SELECT url FROM mainTable where id = 47 and url like '%testsite.com%' and _active = 1 UNION ALL SELECT url FROM detailTable where id = 47 and url like '%testsite.com%' and _active = 1 )resultsduplicate group by resultsduplicate.url having ( count (resultsduplicate.url) >1); Original Source From (Stackoverflow.com)

I have searched for content types which is suitable for ASP.NET or ASP.NET MVC applications using the HttpResponse class ContentType property. Here's the website with the MIME list: Mime Type List Here's a sample asp.net/mvc snippet. HttpResponseBase response = context.HttpContext.Response; response.ContentType = "application/pdf" ; Greg

The problem was that the windows 7 theme was changed to classic window . Turning it back to Windows 7 default view, solved it. Greg

Given you have two WPF windows namely MainWindow and OtherWindow. You basically want to check if the controls in main window have successfully loaded using statements in OtherWindow. The solution is to use Application dispatcher object. if (Application.Current.Dispatcher.CheckAccess()) { while ( true ) { foreach (Window window in Application.Current.Windows) { if (window.Title.Equals( "Project Title" )) { if (window.FindName( "your_control" ) != null ) { //do your stuff here... } } } break ; } } else { Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Background, new Action(CheckMainWindow)); } Cheers!

In our web crawlers, we encountered slow crawling of items specially XML feeds. We checked our codes if there are lines generating bottlenecks. It turned out that we placed GC.Collect() in an inner loop that's processing item per item. The solution is to comment out GC.Collect() in the inner loop and transfer it to the outer loop statement. Here's the code: while (!EndOfPage) { do { if (date != String.empty) { //comment this statement, transfer outside inner loop... //GC.Collect(); //processing of items code statements... } } while (!(url.Equals(String.Empty))); GC.Collect(); PageNo++; if (PageNo > totalPage) { EndOfPage = true ; } } Credits to my fellow developer for the discovery. Greg

Yesterday, while working on Regex Index property, I encountered a weird problem. Supposedly, string.indexOf(string variable) returns -1 value if there's no occurrence of such substring. However, using Regex.Match(source.ToLower(), @"regex pattern" ).Index returns 0 if instead of -1 if no such substring occurs. The solution was pointed out in stack overflow: Return index position of string after match found using Group.Success in which case returns a boolean value. So, here's the tip: if ((Regex.Matches(source.ToLower(), @"<ol[^>]*>" ).Count < 1) && (Regex.Matches(source.ToLower(), @"<ul[^>]*>" ).Count > 0)) { if (Regex.Match(source.ToLower(), @"<ul[^>]*>" , RegexOptions.IgnoreCase).Success) { // your if statements here.... :) } } Greg

Hello, Here's a simple class implementation of a DatagridviewCheckboxColumn. public class DatagridviewCustomCheckboxColumn : DataGridViewCheckBoxColumn { public DatagridviewCustomCheckboxColumn() { this .CellTemplate = new DatagridviewCheckboxCustomCell(); } } class DatagridviewCheckboxCustomCell : DataGridViewCheckBoxCell { public int row_index { get ; set ; } public int CheckboxHeight { get { //your_desired_checkbox_height is a variable //that contains the desired height of your checkbox //you may set or get the property value.. return your_desired_checkbox_height; } } public int CheckboxWidth { get { //your_desired_checkbox_width is a variable //that contains the desired width of your checkbox //you may set or get the property value.. return your_d...

This is based from the article of Vincent Maverick Durano's blog on HIGHLIGHT GRIDVIEW ROW ON CLICK AND RETAIN SELECTED ROW ON POST BACK. I just added some statements on javascript to check if the selected row is less than total gridview row count and server side code for paging. JAVASCRIPT CODE: <script type= "text/javascript" > var prevRowIndex; function ChangeRowColor(row, rowIndex) { var parent = document.getElementById(row); var currentRowIndex = parseInt(rowIndex) + 1; //count number of gridview rows var rowscount = $( "#<%=grdCustomer.ClientID %> tr" ).length; if (prevRowIndex == currentRowIndex) { return ; } else if (prevRowIndex != null ) { parent.rows[prevRowIndex].style.backgroundColor = "#FFFFFF" ; } //check if current index is a number... if (IsNumeric(currentRowIndex)) { //check if row index ...

In a scenario where you want to load images or other resources, Url.Content() does not return the exact resource path like this (D:\Cart\CartProject\Images\Item4.jpg) . Hence, resulting into a null exception or empty resource. Instead of using Url.Content() or ResolveUrl(), i get the server path of the resource using HttpContext of the application. return new ImageResult(HttpContext.Server.MapPath( "~/Images/Item" + id + ".jpg" )); Note: Testing is done locally and not on a virtual directory... Source: Find Absolute Path the the App Data Folder from Controller Cheers!

I encountered this weird problem rendering bitmap image from a database table that a friend of mine develops in his company. The task is to display the image on the mvc view. I thought it was a gif or jpeg or png format. But to my surprise as I rendered the binary data on webpage, the image was a bitmap type.. The code to show the bitmap image is as follows. That is to render the bitmap image into a jpeg format. C# Code: public ActionResult ShowCategories () { var model = from n in oContext.ApplianceCategories select n; return View (model); } public void ShowImage ( int id) { var image = ( from m in oContext.ApplianceCategories where m.CategoryID == id select m.Picture).FirstOrDefault(); TypeConverter tc = TypeDescriptor.GetConverter( typeof (Bitmap)); Bitmap bitmap1 = (Bitmap)tc.ConvertFrom(image); bitmap1.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); } I got the trick from stack o...

In a simple application I'm creating, I have a custom ActionResult class that returns an image data. In my view, I simply used: <%= Html.Action( "GetImage" , "ImageCustom" , new {id = item.CategoryID}) %> to call the custom action class ExecuteResult method. This method reads the image byte array and store's it in a stream object. However, the call generates an error stated in the title. Html.Action writes html which implements text writer class. The solution would be using Url.Action() embedded in the image src attribute: <img src= '<%= Url.Action("GetImage","ImageCustom", new {id = item.CategoryID}) %>' alt= "No Photo" width= "100" height= "100" /> Greg

Recently, I've followed a simple tutorial regarding consuming JSON object in ASP.NET MVC. The error stated from the title of this post appears in IE9. The original snippet is this: $(document).ready( $.getJSON( 'http://localhost:6222/home/customerjson' , function (item) { $( '#result' ) //show product name in .html( '<p>' + item.CurrentCustomer.CustomerName + '</p>' ); } ) ); The solution is to enclose $.getJSON() in a function() statement based from the modified code below. The popup script just went away. $(document).ready( function (){ $.getJSON( 'http://localhost:6222/home/customerjson' , function (item) { $( '#result' ) //show product name in .html( '<p>' + item.CurrentCustomer.CustomerName + '</p>' ); } ) ...

Assuming you have a datatable that has merged contents from different datatables and you want to eliminate the datatable with distinct rows, you can use the statement below. dt.DefaultView.ToTable( true , new string [] { "id" , "name" }); Cheers!

In a scenario where I added columns using AddRange(), I encountered an error as specified by the title. Here's the C# code: table1.Columns.AddRange( new DataColumn[] { col1, col2, col3 }); table2.Columns.AddRange( new DataColumn[] { col1, col2, col3 }); Where col1, col2, col3 are DataColumn objects. What I did was to initialize columns in the addrange method. But there are other solutions in the forums. table1.Columns.AddRange( new DataColumn[] { new DataColumn( "ID" ), new DataColumn( "WEB ID" ), new DataColumn( "URL" ) }); table2.Columns.AddRange( new DataColumn[] { new DataColumn( "ID" ), new DataColumn( "WEB ID" ), new DataColumn( "URL" ) });

Here's the WPF version of prevent total rows from being sorted. Images: 1. Form Load, no column header is clicked (unsorted records) 2. Name header is clicked (sorting by column). The names are sorted alphabetically. Below are the methods used: /// <summary> /// column header clicked(sorting) /// </summary> private void dgProducts_Sorting( object sender, DataGridSortingEventArgs e) { DataRowView rv = (DataRowView)dgProducts.Items[dgProducts.Items.Count - 1]; if (rv[0].ToString().Contains( "Total:" )) { dvCopy = dgProducts.Items.SourceCollection as DataView; rv.Delete(); } sorted_aborted = e.Handled; } /// <summary> /// layout is updated /// </summary> private void dgProducts_LayoutUpdated( object sender, EventArgs e) { if (!sorted_aborted) { ...

Hello, Here's how to add checkbox in WPF Datagrid DatagridTemplateColumn to simulate checkall. I have included the TSQL script, XAML and C# codes. Perform these steps below 1. Create an MSSQL database with the following Product Table schema below: Table: Products Fields: -    ProductID (int, autoincrement) -    ProductName (varchar) -    UnitPrice (decimal) -    QuantityPerUnit (varchar) -    Discontinue (bit)  SQL Script: USE [Your_Database_Name] GO /****** Object: Table [dbo].[Products] Script Date: 05/27/2013 14:07:39 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[Products]( [ProductID] [int] NOT NULL , [ProductName] [varchar](50) NULL , [UnitPrice] [decimal](18, 2) NULL , [QuantityPerUnit] [varchar](50) NULL , [Discontinue] [bit] NULL , CONSTRAINT [PK_Products] PRIMARY KEY ...

Hello, You might have a row in the DataGridView typically the last one that computes total and the grid control is unbound to a datasource. And then if a sorting event occurs, you dont' wanna include that row during sort event. So given that your application has a form and a DataGridView control, the code to perform databinding is handled in the Form Load Event. DataGridViewRow dgRowTotalCount; DataTable dataTable; private void Form1_Load ( object sender, EventArgs e) { DataTable dt = new DataTable( "tblEntTable" ); dt.Columns.Add( "ID" , typeof ( string )); dt.Columns.Add( "Amount" , typeof ( decimal )); dt.Rows.Add( new object [] { "1" , 100.51 }); dt.Rows.Add( new object [] { "2" , 200.52 }); dt.Rows.Add( new object [] { "6" , 500.24 }); dt.Rows.Add( new object [] { "8" , 1000.11 }); dt.Rows.Add( new object [] { "4" , 400.31 }); dt.Rows.Add( new object [] { "5" , 6...

In this scenario, I have to match an exact state abbreviation (QLD) that is Queensland. I declared an array containing state constant values. Normally this would work without using a string variable in C#: Regex.IsMatch(address, @"\bQLD\b" ) However, this won't work: if (Regex.IsMatch(address, @"\b" + str + "\b" )) The solution is to put an @ sign on both "\b" of the expression: string [] states = new string []{ "ACT" , "NSW" , "QLD" }; foreach ( string str in states) { if (Regex.IsMatch(address, @"\b" + str + @"\b" )) { state= str; address = address.Replace(str, "" ).Trim(); break ; } }

Out of boredom, I decided to read some ASP.NET Articles and came stumbling to Dino Esposito's MVP Flavors . After reading it, I decided to translate this into an ASP.NET application. I revised specifically the Presenter class since this has most of the interaction. Below are some snippets and screen shots: Image: 1. Solution Explorer for the Sample ASP.NET MVP Site 2. On Drop Down Selection of Customer 3. Button Expand Is Clicked, Show other records on other textbox controls. Presenter Class: public class Presenter { private IDefaultView view; public Presenter(IDefaultView viewObject) { view = viewObject; } public void InitializeView() { : view.AddCustomer( "Alfreds Futterkiste" , "ALFKI" ); view.AddCustomer( "Ana Trujillo Emparedados y helados" , "ANATR" ); view.AddCustomer( "Antonio Moreno Taquería" , "ANTON...

In this scenario, we have to convert a timezone from Central USA to Hongkong time. I took note of DST here from (-06:00) to (-05:00). Here's a sample query. SELECT CONVERT_TZ( '2012-09-12 04:35:00' , '-05:00' , '+08:00' ) as convert_to_ph; Cheers!

Hello! VB.NET Version: Adding An Item to WPF Datagrid (VB.NET) Here's the C# version of how to add an item manually to a WPF DataGrid. DataGridTextColumn c1 = new DataGridTextColumn(); c1.Header = "Test" ; c1.Binding = new Binding( "test" ); c1.Width = 473; dataGrid.Columns.Add(c1); dataGrid.Items.Add( new Names() {test= "just testing" }); Class property: public string test { get ; set ; } XAML code: <DataGrid AutoGenerateColumns= "False" Height= "289" HorizontalAlignment= "Left" Margin= "10,10,0,0" Name= "dataGrid" VerticalAlignment= "Top" Width= "481" Grid.ColumnSpan= "2" ItemsSource= "{Binding }" > </DataGrid>

Hello! C# Version: Adding An Item to WPF Datagrid (C#) There was a question on visual basic forum on how to add an item to a wpf datagrid. Here's a simple example below. Code view: Dim linkColumn As New DataGridTextColumn : Dim titleColumn As New DataGridTextColumn linkColumn.Header = "Links:" : titleColumn.Header = "Titles:" linkColumn.Width = dataGrid.Width / 2 : titleColumn.Width = dataGrid.Width / 2 linkColumn.Binding = New System.Windows.Data.Binding( "Link" ) : titleColumn.Binding = New System.Windows.Data.Binding( "Title" ) dataGrid.Columns.Add(linkColumn) : dataGrid.Columns.Add(titleColumn) dataGrid.Items.Add( New DataItems() With {.Link = "http://testingme.com" , .Title = "mytesting" }) XAML: <DataGrid AutoGenerateColumns= "False" Height= "289" HorizontalAlignment= "Left" Margin= "10,10,0,0" Name= "dataGrid" Ve...

I successfully installed MSSQL Server 2008 in my working pc. But when I tried creating a database I encountered an error CREATE DATABASE permission denied in database ‘master’.  I recalled my username has no privilege as domain administrator. So, the solution was to  1. login on my  working pc as domain administrator 2. change server authentication to mixed mode 3. change password of sa. 4. reconnect using sa account That's it...

Based from these sources:  a. (http://jobijoy.blogspot.com.au/2007/10/time-picker-user-control.html)  b. Dipitimaya Patra's datepicker in Datagrid I came up with a modified custom timepicker control embedded in WPF Datagrid with databinding features. I encountered bugs on migrating the present time picker custom control throughout development in .Visual Studio 2010 and I manage to fix them myself. The errors are specifically found on the keydown events and time updates (increment/decrement of values). Here are the things that I did to make this work: 1. I added a dependency property to the user control public DateTime TimeValue { get { return (DateTime)GetValue(TimeProperty); } set { SetValue(TimeProperty, value ); } } public static readonly DependencyProperty TimeProperty = DependencyProperty.Register( "TimeValue" , typeof (DateTime), typeof (TimeControlBinding), new UIPropertyMetadata(D...

Here's the code to apply font weight and font color to your datagridview cell. DataGridViewCellStyle style = new DataGridViewCellStyle(); style.ForeColor = Color.Red; style.Font = new Font( this .Font, FontStyle.Bold); dg.Rows[dg.Rows.Count - 1].Cells[i + 2].Style = style;

This snippet will check if mouse coordinate is outside the form coordinates in mouseup event using the object's ClientRectangle property. private void dgvScriptsTime_MouseUp( object sender, MouseEventArgs e) { if (! this .ClientRectangle.Contains(e.Location)) { FShowGrid showGrid = new FShowGrid( "Test" , dgvScriptsTime); showGrid.ShowDialog(); } }

The key is the SqlDataSourceEnumerator to display all instances. You can use gridview or ajax controls for display purposes. protected void Page_Load( object sender, EventArgs e) { // Retrieve the enumerator instance and then the data. SqlDataSourceEnumerator instance = SqlDataSourceEnumerator.Instance; System.DataDataTable table = instance.GetDataSources(); // Display the contents of the table. DisplayData(table); } private void DisplayData(System.DataDataTable table) { foreach (System.DataDataRow row in table.Rows) { foreach (System.DataDataColumn col in table.Columns) { Response.Write(String.Format( "{0} = {1}<br>" , col.ColumnName, row[col])); } } }

To save a RGB color to a Solidbrush object, pass the RGB color in the solidbrush constructor. SolidBrush brush = new SolidBrush(Color.FromArgb(211, 222, 229)); Then apply it in your graphics method. evs.Graphics.FillRectangle(brush, evs.CellBounds); Cheers!

In a program i'm working with, I have a timer event which draws lines or graphs on a picture box. This picture box is inside a tab and panel. When I switched views to other tabs and return to the tab that has the picture box, the previous lines or graphs disappears. I suspect, the controls are redrawn when switching tabs. I tried several solutions and options in picture box paint event and infact tried overriding it. Same results. Luckily, I found a tip in an article to draw the real time graphics on the image itself. This helped solve the issue. Greg

Here's the snippet to limit flicker in forms. Put it above the initialize component method in your constructor. //limit flicker SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true ); InitializeComponent(); Cheers! Source: mijalko

In a scenario when i want to compute the percentage of a process memory consumption against the total memory installed, I encountered a logic error where in the result is zero. The simple formula is this: double x = p.PrivateMemorySize64 / installed_memory_pc * 100; However, the result in x is zero. The trick is to convert p.PrivateMemorySize64 and installed_memory_pc to megabytes by dividing each variable with 1048576. 1Mb = 1048576 bytes. The modified formula is: mbInstalledMemory = ( int )installedMemory / 1048576; mbUsage = ( int )p.PrivateMemorySize64 / 1048576; Then you can apply the percentage formula. Cheers!

Assuming you will access the toolstrip button from another thread, then here's the code on how to enable or disable ToolstripButton using delegates. delegate void EnableDisableButtonRunDeleg( bool value ); private void EnableDisableButtonRun( bool value ) { if (tsMenu.InvokeRequired) { this .tsMenu.Invoke( new EnableDisableButtonRunDeleg (EnableDisableButtonRun), value ); } else { ToolStripItem ts = tsMenu.Items[0]; ((ToolStripButton)ts).Enabled = value ; } } Cheers!

If you want to convert to image, just cast it to a bitmap object. Icon ico = Icon.ExtractAssociatedIcon(process.MainModule.FileName); Source: Stack overflow

I added the snippet below in the columnwidthchanging event: switch (e.ColumnIndex) { case 0: e.NewWidth = 400; break ; case 1: e.NewWidth = 200; break ; case 2: e.NewWidth = 100; break ; case 3: e.NewWidth = 100; break ; default : break ; } e.Cancel = true ; Where 400, 200, and 100 are the original column sizes.

Simply set the error data received and terminate the process. private void button2_Click( object sender, EventArgs e) { foreach (Process p in Process.GetProcesses()) { p.ErrorDataReceived += new DataReceivedEventHandler (p_ErrorDataReceived); } } void p_ErrorDataReceived( object sender, DataReceivedEventArgs e) { Process p = (Process)sender; p.Kill(); }

We encountered a problem where in a web crawler doesn't run on a remote server, but run perfectly on a local machine. The crawler utilizes the web browser control from microsoft. The problem turns out that the local machine's IE browser is version 9 and the remote server has IE 8. The solution was to re deploy the exe file to another remote server that has IE 9. Cheers!

The code below shows how to align a text in a merged cell in excel using C#. chartRange.Merge(Type.Missing); chartRange.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; Source: sanket's blog

Team, Given that you encounter an error such as Object does not contain a definition for get_Range given the original snippet that shows the error below. chartRange = sheet.get_Range(sheet.Cells[row_indicator, column_indicator], sheet.Cells[row_indicator, column_indicator + 11]); The fix to the code snippet above is to cast the cells with object. chartRange = sheet.get_Range(( object )sheet.Cells[row_indicator, column_indicator], ( object )sheet.Cells[row_indicator, column_indicator + 11]); Cheers!

Yesterday, My sql server 2008i stopped working due to error 3417. I tried different solutions as provided by msdn forums and other sites such as compression attributes, network service to be added on security and change log-on to local system and restoring my master db using cmd. All did'nt work. I ended up backing up all my databases, uninstalling the database service but retaining the other features such as business intelligence studio, IDE tools and etc. Then, re installing the database services w/ same credentials as before. Greg

The snippet below sorts the Observable Collection object which is scriptInfo using time_start which is a property of a strongly typed class. scriptInfo.OrderBy(i => i.time_start); Cheers!

In this post, I created a datagrid dynamically or from code. When a record is loaded, the scrolling is slow using Scrollviewer control. So to translate into code behind here's what i come up. Binding bindHeight = new Binding(); bindHeight.ElementName = String.Format( "sizingElement{0}" , index + 1); bindHeight.FallbackValue = 1; bindHeight.Path = new PropertyPath( "ActualHeight" ); //mapGrid is the datagrid object mapGrid.SetBinding(DataGrid.HeightProperty, bindHeight); XAML Markup: <StackPanel x:Name= "spThur" Height= "Auto" Background= "Green" HorizontalAlignment= "Left" Orientation= "Horizontal" > <Rectangle Name= "sizingElement4" Fill= "Transparent" Margin= "1" Height= "333" /> </StackPanel> The mapGrid datagrid is added to the stackpanel. And the Rectangle object is the sizing element.I found the solution from this ...