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 (ie 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
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);
}
}
add something like this to add scroll bars to the datagridview if the scroll bars are missing
InputDataGridView.ScrollBars == Windows.Forms.ScrollBars.Both
'or
InputDataGridView.ScrollBars == Windows.Forms.ScrollBars.Vertical
if (productsDataGridView.InvokeRequired) {
productsDataGridView.Invoke(new MethodInvoker(delegate { LoadInputData() }));
}
在调用禁用单元格方法后简单添加此行
myDataGridView.ScrollBars = ScrollBars.Both;
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