How to check empty controls in C#

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1.00/5 (2 votes)

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using vsstudio 2010 (c#)..

i hv a form.. i want to check first all empty controls like combobox, textbox, etc. but my code works only on a textbox.. need help.. TIA..

What I have tried:

foreach (Control t in this.Controls)
            {
                if (t is TextBox)
                {
                    TextBox textBox = t as TextBox;
                    if (textBox.Text == string.Empty)
                    {
                        MessageBox.Show("Please fill up all fields!!".ToString());
                    }
                    else
                    {
                        //saved
                    }
                }
            }

Posted 19-Apr-17 2:18am

akosisugar

Updated 19-Apr-17 3:11am

v2

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CHill60 19-Apr-17 9:03am

This has nothing to do with SQL or SQL-Server. If you tag your question incorrectly in future you could end up not getting the answers you need. Only tag the languages that the specific question is about (or the code is written in)

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User 4180254 · Answer 1 · 2017-04-19T02:30:00

Solution 1

You can try with below code -

C#

foreach (Control c in this.Controls)
{
    String value = String.Empty;
    switch (c.GetType().Name.ToString())
    {
        case "TextBox":
            //read textbox control value and check
            value = c.Text;
            MessageBox.Show(value);
            break;
        case "CheckBox":
            //read checkbox control value and check
            value = (c as CheckBox).Checked.ToString();
            MessageBox.Show(value);
            break;
        //you can add your futher controls need validation
    }

Posted 19-Apr-17 2:30am

User 4180254

Updated 19-Apr-17 2:39am

v3

Comments

akosisugar 19-Apr-17 8:50am

thank u for the solution.. assume i hv only 2 controls to check, combobox and textbox. where should i put the save code in your proposed sample code?.. im not good in switch case..

[no name] 19-Apr-17 8:56am

In the question, you mention as you need to handle the empty control you can add what other controls you need to handle for empty data scenario.

Now, what other stuff you want to do with our code after this you need to share the details without that no one should be able to helo on it.

akosisugar 19-Apr-17 8:59am

nvr mind sir.. thnk u again for the code..