retain previous value of text box till the form is closed

Question

Hello all ,

I am very new to c# , and learning to make data entry application,
in my entry form when the user clicks save all the data text boxes are refreshed and saved to database and the text box appears empty to enter gain. This is a continuous process.
Now i want my textbox1 to retain the same value where the user first entered till the form is closed.
Please help me how to achieve this?
i tried this code but no use:

private string value;  
        private void materiaNumberTextBox_TextChanged(object sender, EventArgs e)  
        {  
  
            var oldValue = value;  
            value = ((TextBox)sender).Text; // text1.Text  
  
     
        }  

here's the code that does while saving:

private void btnsave_Click(object sender, EventArgs e)  
        {  
            try  
            {  
                String msg = "Confirm Save?";  
                String caption = "Save Record";  
                MessageBoxButtons buttons = MessageBoxButtons.YesNo;  
                MessageBoxIcon ico = MessageBoxIcon.Question;  
                DialogResult result;  
                result = MessageBox.Show(this, msg, caption, buttons, ico);  
                if (result == DialogResult.Yes)  
                {  
                    generateautoID();  
                    this.iP_SpoolsBindingSource.EndEdit();  
                    MessageBox.Show("The Record saved Successfully:" + outputSpoolNoTextBox.Text, "Save_Update",  
                        MessageBoxButtons.OK, MessageBoxIcon.Information);  
                    this.iP_SpoolsTableAdapter.Update(this.pINQCDataSet.IP_Spools);  
                    this.iP_SpoolsTableAdapter.Fill(this.pINQCDataSet.IP_Spools);  
                    //MessageBox.Show("The Record saved Successfully:", "Save_Update",  
                    //MessageBoxButtons.OK, MessageBoxIcon.Information);  
                    this.iP_SpoolsBindingSource.AddNew();  
                    string strStartenddateformat = "dd-MM-yyyy";  
                    materialTypeComboBox.ValueMember = "Tungsten";  
                    unitComboBox.ValueMember = "Mic";  
                    statusComboBox.ValueMember = "Accepted";  
                    cFComboBox.ValueMember = "";  
                    bowOutOfComboBox.ValueMember = "";  
                    ductilityOutofComboBox.ValueMember = "";  
                    finishUOMComboBox.ValueMember = "Mic";  
                    finishTypeComboBox.ValueMember = "Clean";  
                    rejectReason1ComboBox.ValueMember = "";  
                    rejectReason2ComboBox.ValueMember = "";  
                    rejectReason3ComboBox.ValueMember = "";  
                    lotNoTextBox.Text = "0";  
  
  
  
                    dOEDateTimePicker.Format = DateTimePickerFormat.Custom;  
                    dOEDateTimePicker.CustomFormat = strStartenddateformat;  
                    dOEDateTimePicker.Value = DateTime.Now;  
  
                    dOPDateTimePicker.Format = DateTimePickerFormat.Custom;  
                    dOPDateTimePicker.CustomFormat = strStartenddateformat;  
                    dOPDateTimePicker.Value = DateTime.Now;  
                }  
                else  
                {  
                    return;  
                }  
            }  
            catch (Exception ex)  
            {  
                MessageBox.Show("Saving Failed:" + ex.Message.ToString(), "Save",  
                    MessageBoxButtons.OK, MessageBoxIcon.Error);  
            }  
        }  

here's the image of my form:

Answer 1

Hi there

You could save the values in some variables in your save method. Line 13:

string valueTextBox1 = materiaNumberTextBox.Text; 

...

After saving the values you could set the old values to the corresponding controls.