Adding data to an existing data table with c# code

Question

Adding data to an existing data table with c# code

Alfie Chadd 61

Hello, I have been trying to create a login program and adding data to a data table that already exists in the server explorer.

so far I have

`private void button1_Click(object sender, EventArgs e)
{

}`

and the database is called "Logindb" and If I do

Datatable LOGIN = Logindb;

I just get errors, does anyone know how to fix this?

Thanks

Karen Payne MVP 35,606 Reputation points Volunteer Moderator

2022-02-23T11:54:49.503+00:00

The code shown is not enough to provide a recommendation so can you provided a minimal code sample to reproduce the errors?
Also, what are the errors?

Alfie Chadd 61

I have been trying to reuse code from different websites but nothing is working,

    private void button1_Click(object sender, EventArgs e)
    {
         database logindb = LOGINDB;
         textbox1 = newrow username;
         textbox2 = newrow password;
    }

Is all I have

Answer accepted by question author

AgaveJoe 31,361

I have been trying to reuse code from different websites but nothing is working,

Copying code from the internet hoping something will magically work is not a good approach. I would start with a good old tutorial from the official documentation.

Create a simple data application by using ADO.NET

Alfie Chadd 61 Reputation points

2022-02-23T12:32:05.76+00:00

I hate to be a pain but is there any tutorials you recommend for it?
AgaveJoe 31,361 Reputation points

2022-02-23T13:20:25.523+00:00

I'm not really sure what your use case is but any beginning level tutorial related to data access should give you an idea of how to proceed. Start with the tutorial in my last post.

1 additional answer

Your answer

Karen Payne MVP 35,606 Reputation points Volunteer Moderator

2022-02-23T11:54:49.503+00:00

The code shown is not enough to provide a recommendation so can you provided a minimal code sample to reproduce the errors?
Also, what are the errors?
Alfie Chadd 61 Reputation points

2022-02-23T12:06:38.74+00:00

I have been trying to reuse code from different websites but nothing is working,

private void button1_Click(object sender, EventArgs e) { database logindb = LOGINDB; textbox1 = newrow username; textbox2 = newrow password; }

Is all I have
Alfie Chadd 61 Reputation points

2022-02-23T12:32:05.76+00:00

I hate to be a pain but is there any tutorials you recommend for it?
AgaveJoe 31,361 Reputation points

2022-02-23T13:20:25.523+00:00

I'm not really sure what your use case is but any beginning level tutorial related to data access should give you an idea of how to proceed. Start with the tutorial in my last post.

Answer 1

Karen Payne MVP 35,606 Volunteer Moderator

The following shows how to login to an application via SQL-Server (in the article uses SQL-Express but could use LocalDb), Microsoft TechNet SQL Server database login for Windows Forms (C#) and if not using SQL-Server there are elements that can help with validating from another source such as MS-Access which is actually more work than SQL-Server.

0 comments

Share via

Adding data to an existing data table with c# code

1 additional answer

Your answer