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string dsource = @"C:\Users\Comma\Desktop\Working ON\WebBasedData\WebBasedData\Data\Attachments_20131219";

//Put your datasource path in the connection string for example if you have csv files in D:\ directory change datasource= D:\
string constr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dsource + ";Extended Properties='text;HDR=Yes;FMT=Delimited';";

                txtFromDate1.Text = Convert.ToString("MMDDYY");
                txtToDate1.Text = Convert.ToString("MMDDYY");
                string fromdate = txtFromDate1.Text;
                string todate = txtToDate1.Text;
                string fromtime = DropDownList2.SelectedItem.Text;
                string totime = DropDownList3.SelectedItem.Text;

                con.ConnectionString = constr;

                //create instance for command object 
                OleDbCommand cmd = new OleDbCommand();

                cmd.Connection = con;   
                // set your file name in the below query
                cmd.CommandText = "select * from [fpyield && fromdate && fromtime ]" ;
                //Open Oledb Connection to read CSV file 

                //Create one datatable to store data from CSV file
                DataTable dt = new DataTable();

                // Load Data into the datatable 
                //Bind data in the Gridview
                GridViewShow.DataSource = dt;

HI is it possible for me not to read my CSV file in this way "select from [fpyield 12162013 0930] but i want to "select [fpyield differentdate differenttime]" the differentdate and time is selected from a dropdownlist..... thank you
Updated 28-Dec-13 4:36am

This is a real mess. Your ASP.NET website cannot see inside your whole file system, only under the web root. Is that path inside your web site ?


returns "MMDDYY". This is non code, a waste of time. Why are you using it ?

string fromdate = txtFromDate1.Text;

This is, by definition, not a date, but "MMDDYY".

cmd.CommandText = "select * from [fpyield && fromdate && fromtime ]" ;

This is not selecting the value of fromdate or fromtime. It's selecting the constant values "fromdate" and "fromtime". Is this what you meant ?

select from [fpyield 12162013 0930]

This is not what you are doing, not even remotely. I suggest you learn how to use your debugger, so you can see what your code is doing, and how it differs from what you expect.
acing wei 28-Dec-13 1:19am
oops i should take the mmddyy out my mistake... wht i mean is if i use the "select from [fpyield 12162013 0930.csv]" it will read n show me the table in the csv file...instead of doing that what i want is "select from [fpyield fromdate fromtime.csv]" fromdate where i can select different date and fromtime i can select different time. because i got a lot of csv file with different date and time. im doing my final year project and i really need help. thank you ...
Christian Graus 28-Dec-13 1:22am
This is a really ugly way to do things in 2013. Why are you using csvs at all ? Anyhow, as far as I can tell, the support is only for selecting entire columns. Once you have a data set, you can search it in your code. Or you can use SSRS or a stored proc to insert the values in to a real database, and search them there.

acing wei 28-Dec-13 1:38am
i actually suggest my teacher to use database but he refused to... and he forced me to use csv file to read... and i stuck ..i have no idea how to continue but he keep saying this is an easy programme... anyway thank you....
Christian Graus 28-Dec-13 1:39am
Your teacher is a moron. This should worry you. You can use a CSV, but you need to process it in code. I repeat, your teacher is a moron.
acing wei 28-Dec-13 1:44am
Do you have any small sample regarding csv .... if not then never mind...i appreciate it, thank you
Christian Graus 28-Dec-13 1:52am
No, I've never worked with CSVs like this. It's 2013, as I said. But, I did google and find out that you can specify column names to return, and that's about it. In fact, I suspect all you're doing is giving names to the columns. There's no other logic supported, that I can see. So you need to read the whole list, then use LINQ or other code to search it.
acing wei 28-Dec-13 1:59am
my project is to read more than one csv files and plot a chart from the csv files..
okay, thank you very much...

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