978 2
Error implementing Paging in MVC C#

I am trying to add Pagination in ASP.NET MVC using this link(https://qawithexperts.com/article/asp.net/paging-sorting-and-filtering-in-aspnet-mvc-c/31)

...
Type
Question
mvc Razor IPagedList
973 1
Error "Entity Framework: Store update, insert, or delete statement affected an unexpected number of rows (0)"

Hello, I am using Entity framework in my asp.net MVC project, when I try to delete any row using Entity framework, I am getting following error

...
Type
Question
ASP.NET MVC Store update insert or delete statement affected an unexpected C# Entity-framework
945 1
how to improve performance of ASP.NET MVC application?

I would like to know methods to improve performance of asp.net MVC web application? To get better score on Google Page Insights

Thank you

...
Type
Question
asp.net MVC IIS performance
929 1
How to delete a single Record using Entity Framework?

How can I delete (remove) single record from database table using entity framework in asp.net MVC Controller?

please note I want to delete row of selected Id from the database permanently(Not to make a column IsActive and set it as false)

...
Type
Question
C# Entity-framework Delete a single record using EF sql-server
924 1
The model backing the 'bwavenueDbContext' context has changed since the database was created. Consider using Code First Migrations to update the database

I am getting this error when trying to work on Code First migration with Entity Framework

The model backing the 'bwavenueDbContext' context has changed since the database was created. Consider using Code First Migrations to update the database

here is the error image

...

Type
Question
C# Code-first-migration Entity-framework

912 1
How to create N Level Of TreeView from database in asp.net

Hello Guys !!

I have already asked the same question but now I am again asking with the new requirement, so please read carefully and solve my issues.

 My Requirement:

  •    How to create n level of Treeview in asp.net c# from SQL Database Record.

Explaining my Requirement

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="N-level-Treeview.aspx.cs"
Inherits="N_level_Treeview" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeView1" runat="server" ImageSet="XPFileExplorer" NodeIndent="15">
<HoverNodeStyle Font-Underline="True" ForeColor="#6666AA" />
<NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="Black" HorizontalPadding="2px"
NodeSpacing="0px" VerticalPadding="2px"></NodeStyle>
<ParentNodeStyle Font-Bold="False" />
<SelectedNodeStyle BackColor="#B5B5B5" Font-Underline="False" HorizontalPadding="0px"
VerticalPadding="0px" />
</asp:TreeView>
</div>
</form>
</body>
</html>?

: -  I have a table and there are Srno,PId, Pname, CID, CName,Cqty columns in my table.

Suppose if CID is also in PID column,  Node must be created on that CID and also must have expand button to show the child of that cID.

What i have done in coding let's see...

CS--------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class N_level_Treeview : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DataTable dt = this.GetData("SELECT cId, cName FROM TopBill");
this.PopulateTreeView(dt, 0, null);
}
}
 
private void PopulateTreeView(DataTable dtParent, int parentId, TreeNode treeNode)
{
foreach (DataRow row in dtParent.Rows)
{
TreeNode child = new TreeNode
{
Text = row["cName"].ToString(),
Value = row["cId"].ToString()
};
if (parentId == 0)
{
TreeView1.Nodes.Add(child);
DataTable dtChild = this.GetData("SELECT srNo,cid, cName FROM TopBill WHERE pid = " + child.Value);
PopulateTreeView(dtChild, int.Parse(child.Value), child);
}
else
{
treeNode.ChildNodes.Add(child);
}
}
}
 
private DataTable GetData(string query)
{
DataTable dt = new DataTable();
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(query))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
sda.SelectCommand = cmd;
sda.Fill(dt);
}
}
return dt;
}
}
}

-------------- Current Output of my Code is ...

...

Type
Question
Treeview C# Asp.Net SQL
902 1
Clicking on browser back button after login shows login page again??

How can I maintain the session of the user in ASP.NET MVC? Here is the login case for the user. (Only authenticated users are allowed to login in the system.) But once the user gets logged in and press the back button then the user needs to login again. I want to solve this issue. Can anyone have idea about it?

...
Type
Question
ASP.NET MVC C# session-management
893 2
Populating DropDownList with values showing error There is no ViewData item of type IEnumerable SelectListItem that has the key Name

I Have populated the DropDownList with the roles from the AspNetRoles, when I am registering a new user and allocating a role an error is thown

"There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'Name'."

My AccountController :

...
Type
Question
MVC C# SQL
873 1
how can i simplify url in .NET MVC?

How can I simplify the url to http://localhost:51675/Prescriptions/Create/12 instead of http://localhost:51675/Prescriptions/Create?AssessmentID=12.
currently i am using this code

...
Type
Question
C# MVC ASP.NET routing
863 1
No assembly found containing an OwinStartupAttribute. error in asp.net mvc project

Hi, I have just created a project using Visual Studio 2015 & selected MVC template, but When I tried to build the project and executed it in the browser, I got the error as below

The following errors occurred while attempting to load the app.
- No assembly found containing an OwinStartupAttribute.
- No assembly found containing a Startup or [AssemblyName].Startup class.
To disable OWIN startup discovery, add the appSetting owin:AutomaticAppStartup with a value of "false" in your web.config.
To specify the OWIN startup Assembly, Class, or Method, add the appSetting owin:AppStartup with the fully qualified startup class or configuration method name in your web.config.

Here is the Image of the error

...

Type
Question
C# asp.net mvc owin

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