SQL Server :: Dynamically Add Column Name In Query For Search?

Sep 25, 2010

i want to add add coulmn name in sql query at run time and if any field is blank or null than it should not goes with sql query for search ....

column name:

SqlCommand cmd = new SqlCommand("select * from hotelreg where '" + firstName.Text + "' and '" + lastName.Text + "', and '" + address.Text + "' like '%"+textbox1.Text+"%'", con);

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I want to be able to make a query from three dropdownlists but not all three have to be selected to create results. This is what I have so far :

sub getdata (src as object, e as eventargs)
dim strsql as string
dim myconnection as oledbconnection
dim mycommand as oledbcommand
myconnection = new oledbconnection(ConfigurationSettings.AppSettings("MM_CONNECTION_STRING_csrdb"))
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end if
end if
end if

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