Missing DataGridview scrollbar C# WinForm

Question

I have WindowsForm solution with a datagridview to display the data that I read from text file. The number of rows from data is large, about 10.000 lines.

When I run the program from visual studio, it seems fine. But when I run it from the Debug folder (.exe file), then something goes wrong with my datagridview. The scroll-bar is missing.

Here is how I fill the datagridview:

private void LoadInputData()
    {
        try
        {
            InputDataGridView.DataSource = null;
            InputDataGridView.Refresh();
            InputDataGridView.DataSource = inputDataTable;
            DisableCells();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString(), "Load Input Data Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

I have a function that is designed to fill the inputDataTable from a text file. The DisableCells() function is to lock the datagridview (i.e. set the readonly properties be true) and customize the column length.

The data still can be scrolled by mouse. How does it happen? How do I solve this?

Here is preview of my program: link

ehmind ehmind · Accepted Answer · 2014-03-27T04:54:25

I solved the problems. It caused by backgroundworker. I do not know how to explain the concept technicaly. But, here that I did.

I move the LoadInputData(); line. Previously, I put it inside private void OpenDataBackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) function. Then, I moved it to the another place outside the background worker. It can seen in this code below.

Previously: (see the "//")

private void OpenDataBackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        try
        {
            //LoadInputData();
            CalculateRowAndColumnInNumericUpDown();
            mainForm.MainToolStripProgressBar.Value = 0;
            this.Cursor = Cursors.Default;
            OpenDataButton.Enabled = true;

            ProcessGroupBox.Enabled = true;
            ClearAllDataButton.Enabled = true;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString(), "Open Data Background Worker RunWorkerCompleted Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

To this place:

private void OpenDataButton_Click(object sender, EventArgs e)
    {
        try
        {
            OpenDataButton.Enabled = false;

            if (!OpenDataBackgroundWorker.IsBusy)
            {
                OpenFileDialog openData = new OpenFileDialog();
                openData.Multiselect = true;
                openData.ShowDialog();
                openData.Filter = "allfiles|*";

                if (openData.FileName != "")
                {
                    ClearInputDataTable();
                    LoadInputData();
                    OpenDataBackgroundWorker.WorkerReportsProgress = true;
                    OpenDataBackgroundWorker.WorkerSupportsCancellation = true;
                    OpenDataBackgroundWorker.RunWorkerAsync(openData.FileName);
                }
            }
            //here!!!
            LoadInputData();
            OpenDataButton.Enabled = true;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString(), "Error - Open Data", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

Missing DataGridview scrollbar C# WinForm

4 Answers