Get value of ID Column in dataGridView ForEach?

Posted on 2008-06-25
Medium Priority
Last Modified: 2013-12-16
I have some code that I would like to execute for each row in a dataGridView that I am populating from a database.  Does anyone know how I can get the value of the ID Column for each row for this foreach?  Any help is greatly appreciated.

Here is my code if you need it:

(You may notice that the Select Statement and columns in the dataGridView don't add up...  I accidentally deleted part of the Select Statement, so I'll be fixing that today...  In the meantime what is there is correct...

Thanks Again,
//Populate the Collection DataGridView
string conString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Environment.CurrentDirectory + @"\DB.accdb;Jet OLEDB:Database Password=xxxx;";
// create an open the connection
OleDbConnection conn = new OleDbConnection(conString);
OleDbCommand command = new OleDbCommand();
command = conn.CreateCommand();
// create the DataSet
DataSet ds = new DataSet();
// run the query
command.CommandText = "SELECT ID AS [#], CTitle AS [Title], CType AS [Type], CValue AS [Value] FROM Table1 WHERE Tab = 'Tab1';";
OleDbDataAdapter adapter = new OleDbDataAdapter();
adapter = new OleDbDataAdapter(command);
// close the connection
bindingSource.DataSource = ds.Tables[0];
dataGridView1.DataSource = bindingSource;
//Set Value Column Format to Currency
dataGridView1.Columns["Value"].DefaultCellStyle.Format = "c";
//Count the number of rows
int CountString;
CountString = bindingSource.Count;
Label1.Text = CountString + "";
//Total the value of results
String valueString = ds.Tables[0].Compute("Sum(Value)", String.Empty).ToString();
decimal valueString2 = Convert.ToDecimal(valueString);
String valueString3 = String.Format("{0:C}", valueString2);
if (valueString != "")
Label2.Text = valueString3;
// set the size of the dataGridView Columns
this.dataGridView1.Columns[0].Width = 50;
this.dataGridView1.Columns[1].Visible = false;
this.dataGridView1.Columns[2].Width = 311;
this.dataGridView1.Columns[3].Width = 50;
this.dataGridView1.Columns[4].Width = 50;
this.dataGridView1.Columns[5].Width = 100;
this.dataGridView1.Columns[6].Width = 100;
this.dataGridView1.Columns[7].Width = 100;
this.dataGridView1.Columns[8].Width = 100;
this.dataGridView1.Columns[9].Width = 100;
//Sort on the Title Column
DataGridViewColumn sortColumn = dataGridView1.Columns[2];
ListSortDirection direction;
direction = ListSortDirection.Ascending;
dataGridView1.Sort(sortColumn, direction);
//Set the Selected Property of the First Row to False
dataGridView1.Rows[0].Selected = false;
//Clear selection in dataGridView
dataGridView1.CurrentCell = null;

Open in new window

Question by:M_Lyons
LVL 30

Accepted Solution

anarki_jimbel earned 2000 total points
ID: 21871008
Not 100% sure what do you need. Do you need to get a value for row's column if column name, say, is "ID"? Or, in other words, you have a row, and want to get "ID" value from it but does not know what's the column number? Do I understand properly?

If yes, you probably need two nested loops. I have written some sample code, but it's in VB, hope you can understand (it's very straightforward. In button_Click1 we iterate through rows, and through cells in each row, and if cell's owning column is "ID" - we print content.

In Form_Load I just populate the grid.

If you can'r read vb6 code let me know.
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        For Each r As DataGridViewRow In Me.dgv.Rows
            For i As Integer = 0 To r.Cells.Count - 1
                If r.Cells.Item(i).OwningColumn.Name = "ID" Then
                    Debug.WriteLine("ID = " & r.Cells.Item(i).Value)
                End If
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ' create datatable
        Dim dt As New DataTable
        ' create 3 datacolumns
        Dim dc0 As New DataColumn("ID")
        Dim dc1 As New DataColumn("Name")
        Dim dc2 As New DataColumn("Rank")
        ' add columns to datatable
        ' create, fill datarows and add them to table
        Dim dr0 As DataRow = dt.NewRow
        dr0.Item(0) = "22"
        dr0.Item(1) = "Bob"
        dr0.Item(2) = "H"
        Dim dr1 As DataRow = dt.NewRow
        dr1.Item(0) = "44"
        dr1.Item(1) = "Rod"
        dr1.Item(2) = "L"
        Dim dr2 As DataRow = dt.NewRow
        dr2.Item(0) = "66"
        dr2.Item(1) = "Ken"
        dr2.Item(2) = "M"
        ' set table as datasourse for datagridview
        Me.dgv.DataSource = dt
    End Sub

Open in new window


Author Closing Comment

ID: 31470509
Thank you very much, that did work well.  I used a VB to C# converter online.  I love those things...  lol  Thanks Again.

Featured Post

The 14th Annual Expert Award Winners

The results are in! Meet the top members of our 2017 Expert Awards. Congratulations to all who qualified!

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

In real business world data are crucial and sometimes data are shared among different information systems. Hence, an agreeable file transfer protocol need to be established.
This article describes and provides a custom-made tool I wrote to give businesses a means of identifying commercial music content, without having to expend too much effort. Business recordings are easily identified from possibly illegal music files …
The video provides a quick and easy steps to migrate MBOX file to well known Outlook PST and Office 365. Besides this, it also supports and migrates more than 20 email clients of MBOX which include AppleMail, Opera, Thunderbird and SeaMonkey effortl…
Did you know PowerShell can save you time with SaaS platforms? Simply leverage RESTfulAPIs to build your own PowerShell modules. These will kill repetitive tickets and tabs, using the command Invoke-RestMethod. Tune into this webinar to learn how…

607 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question