.NET GENES

Good afternoon! In a situation wherein a single page will contain multiple paging such as displaying master-details records or similar requirements, using a couple or more PagedList pager will cause logical errors such as when you click on the paging of details record to traverse to the next page, the paging of master record will move to the next record as well. In order to solve this dilemma, we need to assign a specific page variable to a PagedList object to prevent this issue from happening. In this example, I'll demonstrate showing products information from AdventureWorks database whose stocks are above or below a certain reorder point. The page model class below has two page properties namely BelowReorderPage and AboveReorderPage . And these properties are assigned to their specific PagedList object whether ProductsBelowReorder or ProductsAboveReorder . PageModel.cs public class PageModel { public int BelowReorderPage { get ; set ; } public int AboveReorderPage {...

Here's an example ASP.NET MVC application that shows information in a DataList layout with pagination using PagedList Pager. The project also integrates Bootstrap for enhancing the UI and display the images from AdventureWorks Products table through an ImageHandler class. The significant files used in this project are: 1. PagingModel.cs/IndexModel.cs - These classes are responsible for defining the page number, size of page, and PagedList property that stores the information that are paged accordingly to it's size. public class PagingModel { public PagingModel () { Size = 24 ; Page = 1 ; } public int Page { get ; set ; } public int Size { get ; set ; } } public class IndexModel { public PagingModel PageModel { get ; set ; } public IndexModel (PagingModel pageModel) { Products = new PagedList<ProductViewModel>( new List<ProductViewModel>(), 1 , pageModel.Size); PageModel = pageModel; } public IPagedList<ProductViewModel> ...

Basing from the post DataTable With Running Total Per Group which applies running total to a DataTable object, we can also achieve the same functionality through the front-end side by changing the structure of the GridView control given that this is an ASP.NET WebForm application. The snippet to set the control's data source is simple such as below: dt.Columns.AddRange( new DataColumn[ 5 ] { new DataColumn( "SrNo" , typeof ( int )), new DataColumn ( "PartyName" , typeof ( string )), new DataColumn ( "ItemName" , typeof ( string )), new DataColumn ( "ChqAmt" , typeof ( int )), new DataColumn ( "PartyCode" , typeof ( string ))}); dt.Rows.Add( 1 , "ABC Water Supply" , "Construction Service" , 400 , "ABC" ); dt.Rows.Add( 2 , "ABC Pump Services" , "Type 24 Engine Pump" , 150 , "ABC" ); dt.Rows.Add( 3 , "ABC Water Supply" , "12 Ft Wa...

Good Evening! There was a question raised by a developer if it's possible to compute the running total of a specific DataTable column per grouping or category. The solution is to mark the category as a flag variable that indicates the group to be calculated. The sample code below creates a DataTable object with fictitious information of hardware materials that belong to a particular group specifically PartyCode column. If a column belongs to that group, it will perform calculations. If not, reset the flag variable and total so as to perform new calculations. When computing totals for large number of records, make sure to sort the DataTable using it's category. DataTable dt = new DataTable(); dt.Columns.AddRange( new DataColumn[ 5 ] { new DataColumn( "SrNo" , typeof ( int )), new DataColumn ( "PartyName" , typeof ( string )), new DataColumn ( "ItemName" , typeof ( string )), new DataColumn ( "ChqAmt" , typeof ( int ...

Good day! I was trying to apply integrate an Image HttpHandler that discourages leeching from one of my Web Forms project to ASP.NET MVC. This hack is found on ASP.NET 2.0 MVP Hacks site. Upon running the ASP.NET MVC project, an issue was thrown to the browser specifically "HTTP Error 500.23 - Internal Server Error. An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode." Upon investigating, I found out that handlers in WebForms are declared in <httpHandlers> under <system.web>. <system.web> <httpHandlers> <add verb= "*" path= "*.jpg" type= "Events.Web.Extensions.NoLeechImageHandler" /> <add verb= "*" path= "*.jpeg" type= "Events.Web.Extensions.NoLeechImageHandler" /> <add verb= "*" path= "*.gif" type= "Events.Web.Extensions.NoLeechImageHandler" /> <add verb= "*" path= ...

To hide a BoundField column but make it's value still accessible through JavaScript just set column's ItemStyle-CssClass and HeaderStyle-CssClass properties using CSS class with value display:none . CSS .hiddenColumn { display : none ; } ASPX <asp:BoundField DataField= "GroupCode" HeaderText= "Group Code" ItemStyle-CssClass= "hiddenColumn" HeaderStyle-CssClass= "hiddenColumn" />

There are several options on how to show images in ASP.NET MVC. One of them is using a generic handler. This method was applied since the early days of ASP.NET Webforms and still can be used with recent frameworks. The class below will render the images on the page by calling the ProcessRequest method which will then get the image from datasources such as database and file system and return it as a Bitmap object. public class ImageHandler : IHttpHandler { private OnlineShoppingDBEntities shoppingContext; public ImageHandler () { shoppingContext = new OnlineShoppingDBEntities(); } public void ProcessRequest (HttpContext context) { if (context.Request.QueryString[ "ProductID" ] != null ) { Product product = shoppingContext.Products.Find(Convert.ToInt32(context.Request.QueryString[ "ProductID" ])); if (product != null ) { Byte[] bytes = product.Image; int height = 0 ; int width = 0 ; height = 100 ; width = 10...

Good evening! Adding a Bootstrap glyphicon to Ajax.ActionLink() helper is similar with Html.ActionLink() except that when the linkText parameter of the helper is empty, it will cause an Ajax issue and an Internal Server Error will be thrown from the browser. If you're going to integrate glyphicons on Ajax.ActionLink() helper and exclude the linkText property, supply that parameter with space instead of empty string so as not to cause jQuery or Ajax issues. @Ajax.ActionLink( " " , "DeleteComment" , "Home" , new { id = comment.CommentID }, new AjaxOptions { OnBegin = "return confirm('Are you sure you want to delete this comment?');" , InsertionMode = InsertionMode.Replace, UpdateTargetId = "event-details-" + Model.Id, HttpMethod = "GET" , }, new { @class = "commentDelete glyphicon glyphicon-trash" }); linkText i...

Hello all, I've been experimenting on how to print html document using the said 3rd party software called iTextSharp . iTextSharp is a popular tool and has several examples on the internet regarding integration to the project and occurring issues. One of the issue I encountered is Invalid nested div tag and is expecting a closing tag input . As I trace back my html source, the tags are well-formed except that they are self closing tags such as <input>, <hr>, <img>, <br> or the like. These tags when passed to an action method as string are not properly closed and thus an issue is thrown by iTextSharp's XMLWorkerHelper's ParseXHtml() method. <img src= "~/Images/success.png" /> <input type= "hidden" name= "OrderStatusHTML" /> <input type= "submit" id= "btnSubmit" value= "Export to PDF" class= "btn btn-success" /> The solution I came up with is to fi...

Hello, Here's how to integrate glyphicon to Html.ActionLink() helper in ASP.NET MVC. The code below will display the glyphicon shopping cart right after the text Checkout of the anchor element. @Html.ActionLink( "Checkout" , "Index" , "Home" , null , new { @class = "btn btn-info glyphicon glyphicon-shopping-cart" }) In order to add the glyphicon before the text of the anchor element, use @Url.Action() instead. <a href= "@Url.Action(" Index ", " Checkout ")" class= "btn btn-info" > <span class= "glyphicon glyphicon-shopping-cart" ></span>Checkout </a> Output: