how to replace all the values in string array with input values on DataGridView

Question

I have a datagridview where all the selected file names are displayed. Next to that column of file name(Dateinamen), there is another column for a new file name(Neue Dateinamen). User can type in new file name. How can I change the file names with the new ones which are typed in by the user?

Here is the code for listing the selected files

if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    string[] dateiNamen = ofd.SafeFileNames;
                    for (int i = 0; i < ofd.FileNames.Count() - 1; i++)
                    {
                            dataGridView1.Rows.Add(dateiNamen[i]);
                    }

                }

Jules_96 · Accepted Answer · 2022-03-02 13:02:43Z

1

At first i would recommend that you have to declare a database. The database could be a List where a FileObject has a structure like that:

public class FileObject
{
    public string FileName {get;set;}
    public string NewFileName {get; set;}
...
}

Next what you have to do, you have to check for the changes. Either you do it manually and you take e.g. the DataGridView.CellValueChanged event and you take the new value to update your List.

Or you use DataBinding and for that you use a DataSet or a DataTable. Tip: Don't forget the value checking of a value changing

answered Mar 2, 2022 at 13:02

Jules_96

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4 Comments

LFLJM Over a year ago

I declared a database as you advised, but I got the following error message: Rows cannot be programmatically added to the DataGridView rows collection when the control is data-bound.

Jules_96 Over a year ago

If you use DataBinding, you add a complete new row to your databound object instead of the datagridview. The datagridview will add it "automatically"

LFLJM Over a year ago

Then, how can I list files on DGV using ofd, just like the code I posted? It doesn't work by defining a new class database.

Jules_96 Over a year ago

Well, you have to "connect" the frontend (datagridview => visualization) with the backend (DataSource => your data). E.g. you can do that with a bindinglist. If you want to add a new row, you have to instanciate a new row and add the data you want to add

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