How do you loop through columns and assing them a specific value?

Question

0.00/5 (No votes)

See more:

I'm working on a school assignment where I import data into a DataGridView in WinForm from a CSV file. This all works perfect, however, now I want to assign a value to a button (In column 5, 6 and 8) These can all vary depending on what the value in the same row, in column 3 is. If the value from column 3 is "Input" on the same row, in column 5, the button needs to be "Input", the rest of the cells in that row after column 5 need to be readonly textboxes.

If the value from column 3 is "Output" on the same row, in column 5, the button needs to be "On", in column 6 it needs to be "Off" and in column 8 it needs to be "On #s"

I've tried:

Looping through all the cells, foreach loops, looping through column 3, but I'm not sure how I can change the value of button in the same row. (They also need to have a different function when you click them, but I think that is easier when I understand how this works)

Here is a preview of the CSV file that needs to be used.

This is the code I've written so far (thats working):

C#

private void btnBevestig_Click(object sender, EventArgs e)
{
    try
    {
        LaadCSVToDataGrid(openFile.FileName);
        dataGridView1.Sort(dataGridView1.Columns[3], ListSortDirection.Ascending);
        dataGridView1.Columns[0].Visible = false;
        dataGridView1.Columns[1].ReadOnly = true;
        dataGridView1.Columns[1].Width = 250;
        dataGridView1.Columns[2].Visible = false;
        dataGridView1.Columns[3].ReadOnly = true;
        dataGridView1.Columns[4].Visible = false;

        DataGridViewButtonColumn btnInput = new DataGridViewButtonColumn();
        dataGridView1.Columns.Add(btnInput);
        btnInput.HeaderText = "Functie";
        btnInput.Text = "";
        btnInput.Name = "colInput";
        btnInput.UseColumnTextForButtonValue = true;

        DataGridViewButtonColumn btnOff = new DataGridViewButtonColumn();
        dataGridView1.Columns.Add(btnOff);
        btnOff.HeaderText = "";
        btnOff.Text = "";
        btnOff.Name = "colInput";
        btnOff.UseColumnTextForButtonValue = true;

        DataGridViewTextBoxColumn txtAantalSeconden = new DataGridViewTextBoxColumn();
        dataGridView1.Columns.Add(txtAantalSeconden);
        txtAantalSeconden.HeaderText = "";
        txtAantalSeconden.Name = "txtAantalSec";
        txtAantalSeconden.ReadOnly = false;

        DataGridViewButtonColumn btnOnSec = new DataGridViewButtonColumn();
        dataGridView1.Columns.Add(btnOnSec);
        btnOnSec.HeaderText = "";
        btnOnSec.Text = "";
        btnOnSec.Name = "colInput";
        btnOnSec.UseColumnTextForButtonValue = true;

        btnOntgrendel.Enabled = true;
        comboBoxProfiel.Enabled = false;
        btnBevestig.Enabled = false;
        btnKiesProfiel.Enabled = false;
        btnNieuwProfiel.Enabled = false;
    }
    catch (Exception error)
    {
        MessageBox.Show(
            error.Message,
            "Fout",
            MessageBoxButtons.OK,
            MessageBoxIcon.Warning
            );
    }
}

What I have tried:

I've tried doing loops, everything worked fine up until the point that I have to edit the button's text.

Posted 8-Feb-21 23:35pm

Aeiral

Updated 15-Feb-21 20:10pm

Kenneth Haugland

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Maciej Los · Answer 1 · 2021-02-15T20:10:00

As to me, you wanted to add calculated column. See: DataColumn.Expression Property (System.Data) | Microsoft Docs[^]

C#

private void CalcColumns()
{
    DataTable table = new DataTable ();

    // Create the first column.
    DataColumn priceColumn = new DataColumn();
    priceColumn.DataType = System.Type.GetType("System.Decimal");
    priceColumn.ColumnName = "price";
    priceColumn.DefaultValue = 50;

    // Create the second, calculated, column.
    DataColumn taxColumn = new DataColumn();
    taxColumn.DataType = System.Type.GetType("System.Decimal");
    taxColumn.ColumnName = "tax";
    taxColumn.Expression = "price * 0.0862";

    // Create third column, calculated column 
    DataColumn totalColumn = new DataColumn();
    totalColumn.DataType = System.Type.GetType("System.Decimal");
    totalColumn.ColumnName = "total";
    totalColumn.Expression = "price + tax";

    // Add columns to DataTable.
    table.Columns.Add(priceColumn);
    table.Columns.Add(taxColumn);
    table.Columns.Add(totalColumn);

    DataRow row = table.NewRow();
    table.Rows.Add(row);
    DataView view = new DataView(table);
    dataGrid1.DataSource = view;
}