How do you Cancel the Form closing on DialogResult.Yes click?

**Falkeli** · Dec 29 '13, 06:45 AM

By the time the code reaches your condition here, the dialog is already closed. What you need to do is edit the code of the dialog itself - and remove the DialogResult.Ye s result from the "Next" button. Or else you can simpoly re-open the dialog box with an other ShowDialog().

**Brian Connelly** · Dec 29 '13, 11:31 PM

Thank you Falkeli. You kind of pointed me in the right direction because I was headed down the wrong path. Removing the Dialog Result Yes was neccessary. At this point I just had a button which I then needed to add an event handler on the click. What was also needed was some how to store the values of the controls on the dialog form. I couln't loop and find the controls using the this.control because it would only find the controls of the main form that called the method. What I did here is declare two private variables and add event handlers on those control textboxes. The event was on the leave event where I stored the values in the private variables. Then when the button was clicked, My need logic and value checking performed what I needed. Here is the code:

Code:

 private void manualEntry(object sender, EventArgs e)
        {
            #region formControls
            System.Windows.Forms.Button next = new System.Windows.Forms.Button();
            next.Text = "Next";
            next.Location = new System.Drawing.Point(10, 70);

            System.Windows.Forms.Button okay = new System.Windows.Forms.Button();
            okay.Text = "Complete";
            okay.Location = new System.Drawing.Point(105, 70);
            okay.DialogResult = DialogResult.OK;

            System.Windows.Forms.Button cancel = new System.Windows.Forms.Button();
            cancel.Text = "Cancel";
            cancel.Location = new System.Drawing.Point(200, 70);
            cancel.DialogResult = DialogResult.Cancel;

            System.Windows.Forms.TextBox sID = new System.Windows.Forms.TextBox();
            sID.Location = new System.Drawing.Point(60, 10);
            sID.Size = new System.Drawing.Size(215, 50);

            System.Windows.Forms.TextBox sName = new System.Windows.Forms.TextBox();
            sName.Location = new System.Drawing.Point(60, 40);
            sName.Size = new System.Drawing.Size(215, 50);

            System.Windows.Forms.Label lblID = new System.Windows.Forms.Label();
            lblID.Font = new System.Drawing.Font(lblID.Font.Name, 12, lblID.Font.Style, lblID.Font.Unit);
            lblID.Location = new System.Drawing.Point(5, 10);
            lblID.Text = "ID:";

            System.Windows.Forms.Label llblName = new System.Windows.Forms.Label();
            llblName.Font = new System.Drawing.Font(llblName.Font.Name, 12, llblName.Font.Style, llblName.Font.Unit);
            llblName.Location = new System.Drawing.Point(5, 40);
            llblName.Text = "Name:";
            #endregion

            Form dialog = new Form();
            dialog.Size = new System.Drawing.Size(300, 140);
            dialog.MaximizeBox = false;
            dialog.MinimizeBox = false;
            dialog.FormBorderStyle = FormBorderStyle.FixedSingle;
            dialog.StartPosition = FormStartPosition.CenterScreen;
            dialog.Text = "Manual Student Entry";
            dialog.AcceptButton = okay;
            dialog.CancelButton = cancel;
            dialog.Controls.Add(next);
            dialog.Controls.Add(okay);
            dialog.Controls.Add(cancel);
            dialog.Controls.Add(sID);
            dialog.Controls.Add(sName);
            dialog.Controls.Add(lblID);
            dialog.Controls.Add(llblName);
            next.Click += next_Click;
            sID.Leave += sID_Leave;
            sName.Leave += sName_Leave;
            dialog.ShowDialog();

            if (dialog.DialogResult == DialogResult.OK)
            {
                if (sID.Text == "" | sName.Text == "")
                {
                    MessageBox.Show("A student id and student name must be entered to be " +
                        "processed.", "Missing Input Error");
                    return;
                }
                else
                {
                    int itIsnumeric = 0;
                    bool isNumeric = int.TryParse(sID.Text, out itIsnumeric);

                    if (isNumeric == true)
                    {
                        oXL = new Microsoft.Office.Interop.Excel.Application();
                        oXL.Visible = false;
                        oWK = oXL.Workbooks.Open(path + "\\" + fileName);
                        oWS = (Microsoft.Office.Interop.Excel.Worksheet)oWK.Worksheets[1];
                        oWS.Cells[i, 1] = sID.Text.ToString();
                        oWS.Cells[i, 2] = sName.Text.ToString();
                        i++;
                        oWK.Save();
                        oWK.Close();
                        oXL.Workbooks.Close();
                    }
                    else
                    {
                        MessageBox.Show("A student id cannot contain a non-numeric value.\r\n" +
                            "Please make the ID correction.", "Student ID Error");
                    }
                }
            }
        }

        void sName_Leave(object sender, EventArgs e)
        {
            System.Windows.Forms.TextBox txt = (System.Windows.Forms.TextBox)sender;
            manualTextboxName = txt.Text;
        }

        void sID_Leave(object sender, EventArgs e)
        {
            System.Windows.Forms.TextBox txt = (System.Windows.Forms.TextBox)sender;
            manualTextboxID = txt.Text;
        }
        void next_Click(object sender, EventArgs e)
        {
            if (manualTextboxID == null | manualTextboxName== null)
            {
                MessageBox.Show("A student id and student name must be entered to be " +
                    "processed.", "Missing Input Error");
                return;
            }
            else
            {
                int itIsnumeric = 0;
                bool isNumeric = int.TryParse(manualTextboxID.ToString(), out itIsnumeric);

                if (isNumeric == true)
                {
                    oXL = new Microsoft.Office.Interop.Excel.Application();
                    oXL.Visible = false;
                    oWK = oXL.Workbooks.Open(path + "\\" + fileName);
                    oWS = (Microsoft.Office.Interop.Excel.Worksheet)oWK.Worksheets[1];
                    oWS.Cells[i, 1] = manualTextboxID.ToString();
                    oWS.Cells[i, 2] = manualTextboxName.ToString();
                    i++;
                    oWK.Save();
                    oWK.Close();
                    oXL.Workbooks.Close();
                }
                else
                {
                    MessageBox.Show("A student id cannot contain a non-numeric value.\r\n" +
                        "Please make the ID correction.", "Student ID Error");
                }
            }

        }

How do you Cancel the Form closing on DialogResult.Yes click?

How do you Cancel the Form closing on DialogResult.Yes click?

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