asp.net – Bits of .NET

Need consistent request/response handling across all endpoints? Custom middleware creates reusable pipeline components. Custom Middleware for Global Exception Handling: // GlobalExceptionMiddleware.cs public class GlobalExceptionMiddleware { private readonly RequestDelegate _next; private readonly ILogger _logger; private readonly IWebHostEnvironment _env; public GlobalExceptionMiddleware( RequestDelegate next, ILogger logger, IWebHostEnvironment env) { _next = next; _logger = logger; _env = env; […]

Asp.Net Core

How to get the current logged in user ID in ASP.NET Core

- 19.03.24 - ErcanOPAK comment

using System.Security.Claims; var userId = User.FindFirstValue(ClaimTypes.NameIdentifier); Note that this extension method only works for Users inside controllers, not view components, as the view component User is of IPrincipal.

ASP.Net MVC

How to use if else block to decide style in Razor

- 20.06.23 - ErcanOPAK comment

Declare a local variable at the beginning of the View: @{ var yourStyle = “”; if(Model.Condition) { yourStyle = “float:left;”; //specific conditions and logic } else { yourStyle = “float:right;”; //any other conditions and logic } } and then just use it in your div: <div style=”@yourStyle”>

ASP.Net WebForms

How to get output return value from SqlDataSource in WebForms

- 14.11.22 - ErcanOPAK comment

When returning a string from a stored procedure as a return parameter, we must set it to a non-null value before the stored proc is called – even if it’s an output-only parameter. So we’ll need to make your parameter have a direction of InputOutput and set a default value: <asp:Parameter Name=”MyReturnParameter” Type=”String” Direction=”InputOutput” DefaultValue=”A […]

ASP.Net MVC / ASP.Net WebForms / HTML / JavaScript

How to use client-side function on checkbox or any asp.net component

- 10.11.22 - ErcanOPAK comment

Here is the Asp part: <label for=”chkCondition”> <asp:CheckBox ID=”chkCondition” Text=”Should i show the div?” runat=”server” onclick=”ShowHideDiv(this)” /> </label> <hr /> <div id=”divToShowOrHide” style=”display: none”> this div will be shown regarding the checkbox checked status. <asp:TextBox ID=”myTextBox” runat=”server” /> </div> And here is the Javascript part: <script type=”text/javascript”> function ShowHideDiv(chkCondition) { var divToShowOrHide = document.getElementById(“divToShowOrHide”); divToShowOrHide.style.display […]

ASP.Net MVC / JavaScript

How to remove searching, filtering, ordering and info from Asp.NET MVC Datatable

- 15.09.22 - ErcanOPAK comment

var table = $(“#datatable”).DataTable({ “paging”: false, “ordering”: false, “searching”: false, “info”: false });

ASP.Net MVC

How to make a checkbox or dropdown readonly in Razor

- 15.09.22 - ErcanOPAK comment

You can add @disabled = “disabled” to the last parameter named HtmlAttributes. @Html.CheckBox(“someNameForYourCheckBox”, CheckedValue (True or Not), new { @disabled = “disabled” }) @Html.DropDownList(“someNameForYourDropDown”, YourSelectList (comes from Model), new { @disabled = “disabled” })

ASP.Net MVC / ASP.Net WebForms / CSS

How to add scroll bar to div in Asp.Net

- 03.07.22 - ErcanOPAK comment

Let’s say we have div in view <div id=”myDiv” class=”div-with-scrollbar”> </div> With this CSS file, you can add a scrollbar .div-with-scrollbar { overflow-y: scroll; width: 100%; height: 500px; }

ASP.Net MVC / ASP.Net WebForms / HTML

How to get the integrity value for a jquery version of script reference in a web page

- 26.04.22 - ErcanOPAK comment

You can use https://www.srihash.org/ to generate links. https://code.jquery.com/jquery-3.6.0.min.js will be generated as <script src=”https://code.jquery.com/jquery-3.6.0.min.js” integrity=”sha512-894YE6QWD5I59HgZOGReFYm4dnWc1Qt5NtvYSaNcOP+u1T9qYdvdihz0PPSiiqn/+/3e7Jo4EaG7TubfWGUrMQ==” crossorigin=”anonymous”></script> You can get all the versions of jquery from here: https://releases.jquery.com/jquery/ Thanks to mscdeveloper for such great post.

ASP.Net MVC / ASP.Net WebForms / JavaScript

How to get session value in Javascript

- 16.04.22 - ErcanOPAK comment

ASP.Net MVC

How to use ? : if statements with Asp.Net Razor

- 30.10.21 - ErcanOPAK comment

<span class=”btn btn-@(item.Value == 1 ? “primary” : item.Value == 2 ? “warning” : “danger”)”>EVALUATE</span> Briefly, we can say that @(condition ? “the value, if the condition is true” : “the value, if the condition is false” )

ASP.Net MVC

Getting index value in Razor ForEach

- 24.10.21 - ErcanOPAK comment

@{int i = 0;} @foreach(var myItem in Model.Members) { <span>@i</span> @{i++;} }

ASP.Net MVC / JavaScript

Populating Javascript array with Model in ASP.Net MVC Razor

- 23.10.21 - ErcanOPAK comment

We just need to loop through the razor collection to populate the Javascript array as below: @foreach (var item in Model) { @:$(function () { @:$(“#map”).googleMap(); @:$(“#map”).addMarker({ @:coords:[@item.Latitude], @:title: `@item.City, @item.District`, @:text: `@item.Address` @:}); @:}); }

ASP.Net MVC / ASP.Net WebForms / JavaScript

Getting Session value in Javascript & Asp.Net

- 29.09.21 - ErcanOPAK comment

ASP.Net MVC

How to render HTML tags Asp.Net MVC

- 25.08.20 - ErcanOPAK comment

string myValue = “<b>Hello</b>”; @Html.Raw(HttpUtility.HtmlDecode(myValue))

ASP.Net MVC / ASP.Net WebForms / JavaScript

How to refresh a DIV content with Javascript

- 23.07.20 - ErcanOPAK comment

To reload a section of the page, you could use jquerys load with the current url and specify the fragment you need, which would be the same element that load is called on, in our below case #myDivId function updateDivContent() { $(“#myDivId”).load(window.location.href + ” #myDivId” ); }

ASP.Net MVC / ASP.Net WebForms / C#

Creating Multiline textbox using Html.Helper function in Asp.Net MVC

- 23.07.20 | 23.07.20 - ErcanOPAK comment

@Html.TextArea(“Body”, null, new { cols = “55”, rows = “10” }) or

How to split string and get first (or n-th) value only

- 20.07.20 - ErcanOPAK comment

string myValueToSplit = “Istanbul, Tokyo, Seoul, Bangkok, Bali, Minsk, Belgrade, Kiev”; var theFirstValue = myValueToSplit.Split(‘,’)[0]; //OUTPUT: theFirstValue = “Istanbul” //You can change [0] as you wish. //For example, if you want to get Kiev, make it [7]

ASP.Net MVC / ASP.Net WebForms / C#

Formatting a Nullable DateTime with ToString() in ASP.Net MVC

- 31.03.20 | 31.03.20 - ErcanOPAK comment

Let’s say we have a Nullable DateTime named StartTime [DisplayFormat(DataFormatString = “{0:dd.MM.yyyy}”)] public Nullable<System.DateTime> StartTime { get; set; }

ASP.Net MVC / Devexpress

How to apply a custom CSS class to Devexpress components

- 30.03.20 - ErcanOPAK comment

For all the Devex Components, you can use ControlStyle > CssClass property to apply your custom CSS class (Example 1 and 2) or you can do it with parameter (if it is allowed – as in Example 3). Here is 3 examples for MVC: @Html.DevExpress().SpinEditFor(m => m.Books.Rating, settings => { settings.Properties.SpinButtons.ShowIncrementButtons = true; settings.Properties.Increment = […]

ASP.Net WebForms / C#

How to calculate the sum of the datatable column in asp.net?

- 14.03.20 | 14.04.20 - ErcanOPAK comment

To calculate the sum of a column in a DataTable use the DataTable.Compute method. DataTable dt; … int sumValue; sumValue = dt.Compute(“Sum(TheSumColumn)”, string.Empty);

ASP.Net MVC / C# / Razor

Using Code Blocks, Mixing Text & C# Code and Comments in Asp.NET MVC Razor

- 06.08.19 | 22.11.19 - ErcanOPAK comment

In Razor you can create blocks of code nearly anywhere using @{ }. A block of code doesn’t emit anything into the output, but you can use the block to manipulate a model, declare variables, and set local properties on a view. Be extremely careful about having too much code in a view, however, because […]

ASP.Net MVC / C#

Using View Model to pass Multiple Models in Single View in MVC

- 22.06.19 | 22.11.19 - ErcanOPAK comment

In MVC we cannot pass multiple models from a controller to the single view. There are a few solution for that problem. But in this article we will use View Model. Here is the solution:

ASP.Net WebForms / Devexpress

Confirm before process with ASPxButton in Devexpress

- 29.05.19 | 22.11.19 - ErcanOPAK comment

If you want to confirm before process with ASPxButton in Devexpress, then you can try the code below:

ASP.Net WebForms / C#

How to use the second argument of Response.Redirect: True or False

- 11.06.18 - ErcanOPAK comment

Response.Redirect(URL, false): The client is redirected to a new page and the current page on the server will keep processing ahead. Response.Redirect(“default.aspx”, false); Response.Redirect(URL, true): The client is redirected to a new page, but the processing of the current page is aborted. Response.Redirect(“default.aspx”, true);

ASP.Net WebForms / C#

How to use and get HiddenField Value in Gridview

- 11.06.18 | 14.04.20 - ErcanOPAK comment

You can add HiddenField to the Gridview like that:

Bits of .NET

Tag: asp.net

.NET Core Middleware Magic: How to Build Pipeline Filters That Transform Your API

How to use if else block to decide style in Razor

How to get output return value from SqlDataSource in WebForms

How to use client-side function on checkbox or any asp.net component

How to add scroll bar to div in Asp.Net

How to get the integrity value for a jquery version of script reference in a web page

How to get session value in Javascript

How to use ? : if statements with Asp.Net Razor

Getting index value in Razor ForEach

Populating Javascript array with Model in ASP.Net MVC Razor

Getting Session value in Javascript & Asp.Net

How to render HTML tags Asp.Net MVC

How to refresh a DIV content with Javascript

Creating Multiline textbox using Html.Helper function in Asp.Net MVC

How to split string and get first (or n-th) value only

Formatting a Nullable DateTime with ToString() in ASP.Net MVC

How to apply a custom CSS class to Devexpress components

How to calculate the sum of the datatable column in asp.net?

Using Code Blocks, Mixing Text & C# Code and Comments in Asp.NET MVC Razor

Using View Model to pass Multiple Models in Single View in MVC

Confirm before process with ASPxButton in Devexpress

How to use the second argument of Response.Redirect: True or False

How to use and get HiddenField Value in Gridview

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