在C＃中满足一个IF条件后立即停止执行方法

Question

I got a couple of if statements. What I want is, as soon as one condition is met, I should get out of the method. I will be using this if statements on filtering data for a datagridview or report. With my code below, it doesn't do this. It seems to go through all conditions. As soon as it finds a condition that meets it, the program executes it and proceeds to another if statement and if it sees that it meets the condition also, it too gets executed. I think this is pretty basic for you. I don't remember or know how I should do this.

private void btnRoute_Click(object sender, EventArgs e)
    {
        if (cbWithRoute.Checked)
        {
            // StartSearch(txtRoute.SelectedValue.ToString());
            MessageBox.Show(@"route");
        }
        if (cbWithRoute.Checked && cbWithWholeSeller.Checked)
        {
            //StartSearch(txtRoute.SelectedValue.ToString(), txtWholeSeller.SelectedValue.ToString());
            MessageBox.Show(@"route wholeseller");
        }
        if (cbWithRoute.Checked && cbWithCustomer.Checked)
        {
            MessageBox.Show(@"route customer");
        } 
        if (cbWithRoute.Checked && cbWithWholeSeller.Checked && cbWithDate.Checked)
        {
            //StartSearch(txtRoute.SelectedValue.ToString(),
            //    txtWholeSeller.SelectedValue.ToString(), Convert.ToDateTime(txtFromDate.Text).ToShortDateString(),
            //    Convert.ToDateTime(txtToDate.Text).ToShortDateString());
            MessageBox.Show(@"route wholseller date");
        }
        if (cbWithRoute.Checked && cbWithCustomer.Checked && cbWithDate.Checked)
        {
            MessageBox.Show(@"route date customer");
        }
        if (cbWithRoute.Checked && cbWithWholeSeller.Checked && cbWithDate.Checked && cbWithCustomer.Checked)
        {
            //StartSearch(txtRoute.SelectedValue.ToString(),
            //    txtWholeSeller.SelectedValue.ToString(), Convert.ToDateTime(txtFromDate.Text).ToShortDateString(),
            //    Convert.ToDateTime(txtToDate.Text).ToShortDateString(), txtCustomer.SelectedValue.ToString());
            MessageBox.Show(@"route wholeseller date customer");
        }
        //else
        //{
        //    MessageBox.Show(@"Check criteria to search.");
        //}

    }

I commented the true code and replaced it with message boxes to show me what checkboxes are checked. Thank you.

Answer 1

Since your method retrun type is void add a return to end of all the if conditions like below;

if (cbWithRoute.Checked)
{
    // StartSearch(txtRoute.SelectedValue.ToString());
    MessageBox.Show(@"route");
    return;
}
if (cbWithRoute.Checked && cbWithWholeSeller.Checked)
{
    //StartSearch(txtRoute.SelectedValue.ToString(), txtWholeSeller.SelectedValue.ToString());
    MessageBox.Show(@"route wholeseller");
    return;
}

and so on....

Answer 2

Where ever you want it to stop executing, place the following line

return;

I wont assume to understand the business logic behind the checks but you may also want to read up on else statements and else if

Answer 3

Else-if is the concept you need. Like below.

if (cbWithRoute.Checked)
    {
        // StartSearch(txtRoute.SelectedValue.ToString());
        MessageBox.Show(@"route");
    }
    else if (cbWithRoute.Checked && cbWithWholeSeller.Checked)
    {
        //StartSearch(txtRoute.SelectedValue.ToString(), txtWholeSeller.SelectedValue.ToString());
        MessageBox.Show(@"route wholeseller");
    }