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      Questions tagged [asp.net]

      ASP.NET is a Microsoft web application development framework that allows programmers to build dynamic web sites, web applications and web services. It is useful to use this tag in conjunction with the project type tag e.g. [asp.net-mvc], [asp.net-webforms], or [asp.net-web-api]. Do NOT use this tag for questions about ASP.NET Core - use [asp.net-core] instead.

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      Validation to check if the user has entered the correct format

      So I have a dynamic grid that has a numeric field in which I have applied masking. Also it has a plus button means the user can add many rows as he wants. The masking is applied like this: <input ...
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      Populating an ICollection from a mySQL

      I've been a long time user of the excellent Stack Overflow but this is my first post. A small webshop is currently undergoing convertion to asp.net Web Forms from classic ASP. The old shop ran Klarna ...
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      Multiview is not working in IIS server, but working well in my local server (XAMPP)

      I am doing multiview in my page. It works well in my local but once I published to server, it cannot works. I have no idea why it happens (NOTES: I've got no errors when deployed) Front end: <...
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      No MediaTypeFormatter is available to read an object of type 'IEnumerable`1' from content with media type 'text/html'.i am getting this error

      IEnumerable StdList; HttpResponseMessage response = GlobalVariables.WebApiClient.GetAsync("Student").Result; StdList = response.Content.ReadAsAsync<IEnumerable>().Result; return View(...
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      RowUniqueID in filtered row

      could somebody help me in C# programing in an web application. Namely, how can we find out RecordUniqueId of the filtered row....in order to further edit (i.e., set values in some other columns in the ...
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      How can I delete an image in my image folder?

      I can delete an image in my database but not in an image folder. I want to delete also the image in folder when I delete the row. public IActionResult Delete(int? id,MotorModel motor) { var motors ...
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      20 views

      lose data for runtime controls on aspx page postback

      In asp.net webform, fields are created in runtime from properties on page_init with initial values .for example 2 text boxes are created based on properties. The user changes first textbox value with ...
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      11 views

      file.copyToAsync(memorystream) is throwing cannot access closed file error for PDF and msg type files

      For below method call whenever i am uploading PDF and msg files, i am getting cannot access closed file error in await file.CopyToAsync(memoryStream); public async void FileUpload(string createdBy, ...
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      19 views

      Asp.Net Framework MVC 5 - How to prevent the entire View from being reloaded when uploading files

      Before click After Click I'm trying to update only in Modal (Bootstrap) with the list of files I just uploaded. I am returning a partial view in Json. The problem is that the entire View is reloaded ...
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      18 views

      How to select gridview cells by dragging the mouse over it

      Please i have a gridview with textbox template fields. I want if i drag the mouse on the gridview then those cells get selected just like how excel works. How do i achieve that. Thank you.
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      Unable to build angular project due to error: The error output was: Option “vendorSourceMap” is deprecated

      Full error message - AggregateException: One or more errors occurred. (One or more errors occurred. (The npm script 'start' exited without indicating that the Angular CLI was listening for requests. ...
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      30 views

      Pull html table from other source

      I am working on a web page which is loading products from JSON file. Page loaded my important information and there is button which is called more info. When i click on that button i want to load big ...
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      25 views

      Connect HTTP response to SQL database [closed]

      I need to use SQL and Asp.net to make a system that sends the HTTP response / Request response to a site, shows the data retrieved from the SQL server and then, shows what they have received after ...
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      17 views

      Property Injection of Autofac failed when I called the generic property injected in base class from the subclass

      I do property injection all in StartUp file in Asp.Net project by using the Autofac function called RegisterAssemblyTypes. Here is the image shows the details :enter image description here My program ...
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      21 views

      C# Dropdown Datasource From Object with many properties

      I have a class with many properties, about 20 properties and some data has long description. I want to set dropdown datasource from this data. As it is known, Dropdownlist only need 2 data for ...

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