Textbox value is greater than>1 then execute quary (textbox value is subtraction of two date)

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textbox1 value come from data base and textbox2 value from data base and subtract textbox1-textbox2 and vale print on textbox3 how it check all id from data base where i get value greater than 1 it execute and show that id data from data base

What I have tried:

i try looping their but i cant define it

Posted 15-Feb-16 21:09pm

Member 12330102

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Suvendu Shekhar Giri 16-Feb-16 3:21am

Share the relevant code (not all) you have tried so far.

Member 12330102 16-Feb-16 3:38am

private void display()
{
try

{

string ss2 = "Select Date_of_maintenance,Next_date_of_maintenance From CMC ";
if (con.State != ConnectionState.Open)
con.Open();
SqlCommand command = new SqlCommand(ss2, con);
command.ExecuteNonQuery();

DataSet dataSet = new DataSet();
SqlDataReader reader = command.ExecuteReader();
reader.Read();

if (reader.HasRows)
{
textBox1.Text = reader[0].ToString();
textBox2.Text = reader[1].ToString();

DateTime date1 = Convert.ToDateTime(textBox1.Text);

DateTime date2 = Convert.ToDateTime(textBox2.Text);

TimeSpan ts = date2 - date1;

textBox3.Text = ts.TotalDays.ToString();
con.Close();
con.Open();

int value;
if (Int32.TryParse(textBox3.Text, out value))
{
if (value > 0)
{

string ss21 = "Select Machine_Id,Machine_name,S_provider_name,Contact_number From CMC ";
if (con.State != ConnectionState.Open)
con.Open();
SqlCommand command1 = new SqlCommand(ss21, con);
command1.ExecuteNonQuery();

DataSet dataSet1 = new DataSet();
SqlDataReader reader1 = command1.ExecuteReader();
reader1.Read();

if (reader1.HasRows)
{

label23.Text = reader1[0].ToString();
label24.Text = reader1[1].ToString();
label25.Text = reader1[2].ToString();
label26.Text = reader1[3].ToString();
}
}
else
{
// not a number in textbox
}

}

Member 12330102 16-Feb-16 3:39am

it show or display for only one id. it not check whole database id

1 solution

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Suvendu Shekhar Giri · Answer 1 · 2016-02-15T21:35:00

If both the values for Textbox1 and Textbox2 are coming from the database and you just need to show the substraction of these two values in Textbox3 then you can build the query something like following

SQL

SELECT Value1, Value2, (Value1-Value2) AS Value3
FROM YourTable

and if you need to apply any filter as you have mentioned in the question, you can do something like-

SQL

SELECT Value1, Value2, CASE WHEN (Value1-Value2)>1 THEN (Value1-Value2) ELSE NULL END AS Value3
FROM YourTable

If your requirement is something else then this, please let me know with some words of description about your requirement.

:)