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How can I get dataGridView user input?

How to detect and get user input from dataGridView cell?
For example, I want to put an integer into a cell and after I submit, it would make the calculations using it.
Solution:
I chose CellValidated event
private void dataGridView1_CellValidated(object send, DataGridViewCellEventArgs e)
{
label1.Text = dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString();
}
Simply, it will give you the value of the last edited cell and show it in the label.
Thanks for giving references.

Implement CellEndEdit event and use the cell property FormattedValue/EditedFormattedValue to get the edited value.

C# show property in textbox depending on combobox selecteditem

I have maybe an easy question but I would like to ask about possibilities how to bind textbox Text property to combobox SelectedItem property. I do it through combobox SelectedItemChanged event and set text like this:
if(cmbMeasuring.SelectedItem != null)
txtMethod.Text = ((ListBoxItem)cmbMeasuring.SelectedItem).Value;
I have class ListBoxItem which holds 2 strings "Name" and "Value". Then I created BindingList for combobox:
private BindingList<ListBoxItem> lst;
and then set combobox data source in constructor:
cmbMeasuring.DataSource = lst;
cmbMeasuring.DisplayMember = "Name";
This works fine but I dont know if its the best way how to do it. But problem occurs when I change the textbox content. I do it through textbox Leave event:
private void txtMethod_Leave(object sender, EventArgs e)
{
if (cmbMeasuring.SelectedItem != null)
((ListBoxItem)cmbMeasuring.SelectedItem).Value = txtMethod.Text;
}
If textbox lost focus I assign item value. But I have also a menustrip to save input and when I click to it directly this event dont occur so the last input is not saved. I know that this could be done through textbox TextChanged event but it consume a lot of time.
Do you have any better solutions or is it OK? Im not using WPF.
Thanks.

If you have a Click event for the MenuStrip item, you can do the following
MyMenuStripItem.Focus();
This should cause the MenuStrip item to gain focus and therefore causing the TextBox to lose focus.

Try data binding on the TextBox in your form's constructor:
txtMethod.DataBindings.Add("Text", lst, "Value",
false, DataSourceUpdateMode.OnPropertyChanged);

Checkbox in DataGridView does not change its value after checking it

I have checkboxes in one of my columns in DataGridView.
And now I have a problem: When I click once on Checkbox it changes but only visualy, in code its value is still set to false. But if I click on Checkbox and then anywhere else on my datagridview (or change its value manually in code on true) it changes its value on true.
How can I force my checkbox to change value after one click? (it's annoying that checking checkbox actually does not check it).
Thanks for any help.

Changes to underlying data source are applied when the controls lose the focus.
You can handle it explicitly in CellContentClick event.
Please read the linked documentation thoroughly, as it describes similar scenarios, and discusses different type of grid cells.
Found also this. Exactly the same problem.

Lets assume like you have a form with name Form1
A DataGridView in it name dgv
A CheckBoxColumn in it with ColumnIndex = 5
public Form1()
{
InitializeComponent();
dgv.CellContentClick += dgv_CellContentClick;
}
Commit the change for datagrid within the event for that specific column
private void dgv_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 5) dgv.EndEdit();
}

Datagridview execute code on change of the column combo box value

I am trying to reload the datagridview on change of the combobox value in on of that datagridview columns. I know how to do the reload, but I am having trouble triggering the action. Should I be looking for value change in this particular cell or is there a change in comobobox action?

I typically use ComboBox_TextChanged events and you can use those within a datagridview as well, as you add them:
comboBox1.TextChanged += delegate(object sender, EventArgs e)
{
// Do Whatever
}

Do a DataGridView1.Refresh() on the combobox change event.

Read a dynamically created textbox in a Gridview

I am dynamically adding a textbox to certain rows (one column only) of a gridview. I add the controls with this insdie of a test condition (works fine):
TextBox txtASIN = new TextBox();
txtASIN.ID = "TxtASIN" + e.Row.RowIndex;
e.Row.Cells[4].Controls.Add(txtASIN);
int i = e.Row.Cells[4].Controls.Count; //TEST: This returns 1 correctly
I want the user to be able to enter values into one or more of these textboxes and then update the database with a single button click (not one click for each row). The problem I'm having is how to access those values on a button click event. I did a simple test this way to try to see the value in the second row but get null in temp1 (I am certain there is a value entered in that textbox):
protected void btnUpdate1_Click(object sender, EventArgs e)
{
TextBox temp = (TextBox)GridView2.Rows[1].FindControl("txt1");
string temp1 = temp.Text;
int i = GridView2.Row.Cells[4].Controls.Count; //TEST: This returns 0 incorrectly }
Once I can make this work, I can iterate through the rows and do what I need to do with the values. I don't know if the text entered in the textbox is actually readable without a postback but I'm otherwise stumped. Open to better suggestions on how to do this.
Thanks.
EDIT: Here is where I am now. I can see the textboxes in my column fine. I put a break in on a button that attempts to read them and this is what I'm seeing. If I check GridView2.Rows[0].Controls.Count, I get 8, which is the correect number of columns. If I check GridVeiw2.Rows[0].Cells[4].Controls.Count, I get 0, which is wrong because the textbox is there. I can get a Count of 1 right after I dynamically create it but not when I perform a subsequent button click.
Can anyone explain this? I feel if I can get past this holdup, I can get the rest done.
Thanks again.

You need to assign an ID to the TextBox controls and then access them by that ID in FindControl(). Also, make sure you're adding the controls in the Page's Init() method of the life-cycle. That way it gets added to ViewState.
TextBox txt1 = new TextBox();
txt1.ID = "txt1";
e.Row.Cells[4].Controls.Add(txt1);
EDIT: I just remembered another possible solution. Instead of programatically creating the TextBox controls in the code-behind just create a TemplateField in the GridView.
Add Textbox TemplateField Column To GridView Programmatically

I would try a different approach, putting the text box in the html markup of the page and then control the visible or readonly property of it on the ItemDataBound event. That way, the control will always be there and you don't have to worry about the lifecycle stuff.