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The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications
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ASP.NET C#
Visual Studio 2017
Description:
I am creating a form where the user clicks an image (image has runat='server' attribute), and then uploads a new image that replaces the old image.
( Note: that when the user uploads a new image it is renamed to exactly the same name as the old image. )
I'm using a hidden Fileupload control for uploading images.
Problem:
Initially ( when I upload the first version of the image ) everything works fine, but once I start uploading new images ( to replace the old ones ) I start getting the error:
Code Sample:
I do some validation checks and then something like:
I tried adding this to see if it works but I still have the same issue:
I've also tried toggling images to see if that helps. For example: If the current image is xxxxa.jpg then save as xxxxb.jpg. But I still get the same error message.
Final Notes:
I am able to upload images but it seems to be random, sometimes it works and sometimes ( often ) I get the error message. I've tested the same code on my desktop and everything works great but when I put it on the live server I start seeing the error message.
Visual Studio 2017
Description:
I am creating a form where the user clicks an image (image has runat='server' attribute), and then uploads a new image that replaces the old image.
( Note: that when the user uploads a new image it is renamed to exactly the same name as the old image. )
I'm using a hidden Fileupload control for uploading images.
Problem:
Initially ( when I upload the first version of the image ) everything works fine, but once I start uploading new images ( to replace the old ones ) I start getting the error:
System.IO.IOException: The process cannot access the file 'filename' because it is being used by another process.
Code Sample:
I do some validation checks and then something like:
try
{
fileUpload.PostedFile.SaveAs(path);
}
catch (Exception ex)
{
lblMessage.InnerText = ex.ToString();
}
finally
{
fileUpload.Dispose();
}
I tried adding this to see if it works but I still have the same issue:
private void SaveFile(FileUpload fileupload, string path)
{
fileupload.PostedFile.SaveAs(path);
const int numberOfRetries = 10;
const int delayOnRetry = 1000;
for (int i = 1; i <= numberOfRetries; ++i)
{
try
{
fileupload.PostedFile.SaveAs(path);
break;
}
catch (IOException e) when (i <= numberOfRetries)
{
Thread.Sleep(delayOnRetry);
}
}
}
I've also tried toggling images to see if that helps. For example: If the current image is xxxxa.jpg then save as xxxxb.jpg. But I still get the same error message.
Final Notes:
I am able to upload images but it seems to be random, sometimes it works and sometimes ( often ) I get the error message. I've tested the same code on my desktop and everything works great but when I put it on the live server I start seeing the error message.
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Hi
I have a template field text box in my ASP.net GridView. I have managed to trigger
the VB.net code when the text in the GridView text box is changed. How do get the GridView
RowIndex and the text value? Also this code only triggers once you move out of the text box.
Is there a way to trigger it without having to do this?
I have a template field text box in my ASP.net GridView. I have managed to trigger
the VB.net code when the text in the GridView text box is changed. How do get the GridView
RowIndex and the text value? Also this code only triggers once you move out of the text box.
Is there a way to trigger it without having to do this?
Protected Sub OnTextChanged(ByVal sender As Object, ByVal e As EventArgs)
ClientScript.RegisterClientScriptBlock([GetType](), "alert", "alert('" & (TryCast(sender, TextBox)).Text & "');", True)
Dim S As String
Dim oRowIndex As Integer
Try
Catch ex As Exception
End Try
End Sub
Hi experts,
I saw this example on Grouping with linq.
https://ole.michelsen.dk/blog/grouping-data-with-linq-and-mvc.html
I also saw this example.
https://stackoverflow.com/questions/1160420/how-do-i-group-data-in-an-asp-net-mvc-view
I have a ASP.NET MVC application using C# , Razor and Entity Framework, database first model.
I'm using the Orders table from the Northwind database.
My application directory looks likes this:
My controller looks like this:
My view looks like this:
When I run my app it shows the Orders table.
Now I want to Group it by Customer ID.
I looked at this example to try to group my example but I'm having a hard time grouping it.
https://ole.michelsen.dk/blog/grouping-data-with-linq-and-mvc.html
How do I revise my example so it groups by CustomerID.
So my View should look like this:
This is my current code for my Controller:
I saw this example on Grouping with linq.
https://ole.michelsen.dk/blog/grouping-data-with-linq-and-mvc.html
I also saw this example.
https://stackoverflow.com/questions/1160420/how-do-i-group-data-in-an-asp-net-mvc-view
I have a ASP.NET MVC application using C# , Razor and Entity Framework, database first model.
I'm using the Orders table from the Northwind database.
My application directory looks likes this:
My controller looks like this:
My view looks like this:
When I run my app it shows the Orders table.
Now I want to Group it by Customer ID.
I looked at this example to try to group my example but I'm having a hard time grouping it.
https://ole.michelsen.dk/blog/grouping-data-with-linq-and-mvc.html
How do I revise my example so it groups by CustomerID.
So my View should look like this:
This is my current code for my Controller:
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;
using NorthwindApp.Models;
namespace NorthwindApp.Controllers
{
public class HomeController : Controller
{
private NorthwindEntities db = new NorthwindEntities();
// GET: /Home/
public ActionResult Index()
{
// Order by
I wonder if this is because of IIS and how the site is setup
1. My coworker set up an IIS site like this
2. You see there's a path assets-->pages-->img-->log
/assets/pages/img/login/bg1
../assets/pages/img/login/bg1
~/assets/pages/img/login/bg1
3. Images under this folder show up "img". This is in the root folder of that "Demo" site. In the image above, I've marked the folder with XX. I have it like this ~/img/CSI-logo.png
When I look at Chrome's console, that path is translated to this (has "demo" in the beginning of it)
4. If I hard code the "demo" root folder, then the image shows up /Demo/assets/pages/img/login/bg1
Why is this? I don't want to hardcode /Demo/ How can I fix this? what path do I need to use?
1. My coworker set up an IIS site like this
2. You see there's a path assets-->pages-->img-->log
/assets/pages/img/login/bg1
../assets/pages/img/login/bg1
~/assets/pages/img/login/bg1
3. Images under this folder show up "img". This is in the root folder of that "Demo" site. In the image above, I've marked the folder with XX. I have it like this ~/img/CSI-logo.png
When I look at Chrome's console, that path is translated to this (has "demo" in the beginning of it)
4. If I hard code the "demo" root folder, then the image shows up /Demo/assets/pages/img/login/bg1
Why is this? I don't want to hardcode /Demo/ How can I fix this? what path do I need to use?
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ASP.NETSponsored by Jamf Now
124K
Solutions
28K
Contributors
The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications
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