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	[x] Attachment Details

Datagridview comboboxcolumn Oracle datasource problem

Zones: Windows Forms for .Net, C# Programming Language, PL / SQL

Tags: c#

I have a cobobox column in a datagridview that works fine with the attached code; it displays the correct text for the value it retrieves from the database.
However, If I make a minor alteration to the code to handle null values, it doesn't work. I get the
{"DataGridViewComboBoxCell value is not valid."} error.

When I handle the error and cancle straight out of it, the key value is displayed in the combobox, which is a valid value, as it worked fine previously.

I've tried handling the null value as follows, but again, I just get the value (1009107) displayed in the combobox, not it's equivalent text.
In both cases, clicking on the combobox removes the key value and displays the dropdown list as expected.

         
           
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             string SQL
	= "select tr.recommendation_id  "
	+ ", substr(tco.COMMON_DESCRIPTION,instr(tco.COMMON_DESCRIPTION,' ') +1) Result  "
// This works fine
	+ ", tr.FIRST_TIME_ACCEPTANCE_CODE_ID RFT_CODE_ID "
// This doesn't
	+ ", nvl(tr.FIRST_TIME_ACCEPTANCE_CODE_ID, 1009107) RFT_CODE_ID "
// Neither does this
	+ ", decode(tr.FIRST_TIME_ACCEPTANCE_CODE_ID, null, 1009107, tr.FIRST_TIME_ACCEPTANCE_CODE_ID) RFT_CODE_ID "
	+ "from t_recommendations tr  "
	+ "	, t_products tp  "
	+ "    , exii.t_codes tc "
	+ "    , t_common tco  "
	+ "    , t_providers tpr "
	+ "where tr.PRODUCT_ID = tp.PRODUCT_ID  "
	+ "and tr.PREMIUM_FREQUENCY_CODE_ID = tc.code_id  "
	+ "and tr.factfind_id = '" + factfindID + "' "
	+ "and tr.letter_id = '" + letterID + "' "
	+ "and tr.ACCEPTED_CODE_ID = tco.COMMON_ID "
	+ "and tr.PROVIDER_ID = tpr.PROVIDER_ID(+)  "
	+ "order by 1 "
	;
OracleDataAdapter da = new OracleDataAdapter(SQL, Connection);
DataTable dtRFT = new DataTable();
da.Fill(dtRFT);
dgvRFT.DataSource = dtRFT;

           
         

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5.4

Question Stats

Zone: Programming

Question Asked By: graham_ball

Solution Provided By: graham_ball

Participating Experts: 3

Solution Grade: B

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