i can not display the data

hany mohamed

When I open the page, the data recorded

 Why I cannot display data

@page
@model MyStore.Pages.Clients.IndexModel
@{
}



List of Clients
New Client

    @foreach(var item in Model.listclients)
        {
            
        }
    
    
        
            ID
                
            Name
                
            Email
                
            Phone
                
            Address
                
            Created At
                
            Action
                
        
    
    
                @item.id
                @item.name
                @item.email
                @item.phone
                @item.address
                @item.created_at
                
                    Edit
                    Delete
                
            

This is the code
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.Data.SqlClient;

namespace MyStore.Pages.Clients
{
    public class IndexModel : PageModel
    {
        public List listclients = new List();
        public void OnGet()
        {
            try
            {
                string connectionString = "Data Source=.\\sqlexpress;Initial Catalog=mystore;Integrated Security=True;Encrypt=True;Trust Server Certificate=True";
                using (SqlConnection connection = new SqlConnection(connectionString))
                {
                    connection.Open();
                    string sql = "SELECT * From clients";
                    using (SqlCommand command = new SqlCommand(sql, connection))
                    {
                        using (SqlDataReader reader = command.ExecuteReader())
                        {
                            while (reader.Read())
                            {
                                ClientInfo clientInfo = new ClientInfo();
                                clientInfo.id = "" + reader.GetInt32(0);
                                clientInfo.name = reader.GetString(1);
                                clientInfo.email = reader.GetString(2);
                                clientInfo.phone = reader.GetString(3);
                                clientInfo.address = reader.GetString(4);
                                clientInfo.created_at = reader.GetDateTime(5).ToString();
                                listclients.Add(clientInfo);
                            }
                        }
                    }

                }
            }

            catch (Exception ex)
            {
                Console.WriteLine("Exception : " + ex.ToString());
            }

        }
    }
    public class ClientInfo
    {
        public string id;
        public string name;
        public string email;
        public string phone;
        public string address;
        public string created_at;
    }
}

ID		Name		Email		Phone		Address		Created At		Action
@item.id	@item.name	@item.email	@item.phone	@item.address	@item.created_at	Edit Delete

in the database does not appear. Are there any other files that should be related to this? i am using vb 2022 razor page .Net8

8 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs2y ago
You need to determine where it is failing. The following are likely possibilities.
- SqlConnection
- SqlCommand
I noticed that your catch block is using Console.WriteLine. That won't work in a website. Change that to something else, such as System.Diagnostics.Debug.WriteLine.
+2
hany mohamed2y ago
any update please
+1
hany mohamed2y ago
any update please
+2
hany mohamed2y ago
Dear Mr. Sam, thank you for your response. The project is actually working, but I cannot view the data recorded in the database. I have noticed that even if I change the connection statement to another database, the project is not affected, which means that it does not read the database at all. attached the database
+2
Sam Hobbs2y ago
I downloaded your project and tried it. It does not work for me since the download does not include the database. I converted the project to use a different database and it works for me.

I suggest putting a breakpoint (F9) on the connection.Open(); then debugging it. When the breakpoint is hit single-step through the code to see what happens. If you do not know what breakpoints are and/or if you do not know how to single-step then read articles about debugging.
+2
hany mohamed2y ago
My dear brother Muhammad, thank you for your kind response. I have done everything as you requested and I still cannot display the data, but I want to know what is the link between the one that makes the page read the data and are there any other files in the program that must be configured. I am new in this field. Attached is the entire project.
+3
Tahir Ansari2y ago
check the below steps for troubleshooting:
1. Check Database Connection: Ensure that your database connection string is correct and that your application can connect to the database. You can do this by testing the connection string outside of your application or by using debugging techniques within your application.
2. Verify SQL Query: Double-check your SQL query to ensure it's fetching the data you expect. You can run the SQL query directly against your database (using a SQL client or tool) to see if it returns any results.
3. Handle Exceptions: Instead of simply writing the exception to the console, consider logging it or returning an error message to the user interface so that you can identify any issues more easily.
4. Inspect Data: If you suspect that the issue lies with the data retrieval process, you can add debug statements or breakpoints to inspect the data as it's being retrieved from the database.
5. Ensure Data Exists: Make sure that there are records in your clients table in the database. If the table is empty, your code will not display any data.
6. Check Permissions: Ensure that the user account specified in your connection string has the necessary permissions to read from the clients table.
+3

Tahir Ansari2y ago

Typo in anchor tags: You have used herf instead of href in your anchor tags.
Typo in table class attribute: You have written calss instead of class in the table element.
You haven't imported the necessary namespaces. You should add using System.Collections.Generic; at the beginning of your code file to use the List class.

@page
@model MyStore.Pages.Clients.IndexModel
@using System.Collections.Generic; // Add this line



List of Clients
New Client

    @foreach(var item in Model.listclients)
        {
            
        }
     
    
        
            ID
            Name
            Email
            Phone
            Address
            Created At
            Action
        
    
    
                @item.id
                @item.name
                @item.email
                @item.phone
                @item.address
                @item.created_at
                
                    Edit
                    Delete