How Can Remove Duplicate In The Com box

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How Can Remove Duplicate In The Com box

//Sub Category
try
{
DataTable dt9 = new DataTable();
//string CS9 = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;

{
string query9 = "select DISTINCT catName1 from tblcatProducts ";

SqlDataAdapter da9 = new SqlDataAdapter(query9, con2);
con2.Open();
DataSet ds9 = new DataSet();
da9.Fill(ds9, "tblcatProducts");
comboBoxSub1.DisplayMember = " catName1";
comboBoxSub1.ValueMember = "catId";
comboBoxSub1.DataSource = ds9.Tables["tblcatProducts"];
}
}
catch { }

Posted 12-Jun-15 9:40am

Member 11280947

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Comments

Afzaal Ahmad Zeeshan 12-Jun-15 16:03pm

Where is the duplicate?

Above code won't even compile, because C# requires you to append the (Exception) after catch keyword.

Dave Kreskowiak 12-Jun-15 16:07pm

No it doesn't. A catch {} is perfectly legal. There's nothing that says you must use the exception in your catch code block.

In his code sample, it's pretty much crap code because he's eating the exception so there's no way to tell if a problem shows up unless you see something unexpected in the UI.

Afzaal Ahmad Zeeshan 12-Jun-15 16:10pm

Perhaps then I was having an empty parenthesis which caused the problem. Stupid me!

Samira Radwan 12-Jun-15 16:38pm

you select DISTINCT one column, there won't be duplicate values for sure!

Samira Radwan 12-Jun-15 16:40pm

Could you please review your code, you select one column and when binding the combobox you display catName1 and combobox value is catId !!

Member 11280947 12-Jun-15 17:57pm

Thank you the problem is combobox value

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Dave Kreskowiak · Answer 1 · 2015-06-12T10:10:00

What's a "Com box"? I take it you're refering to a ComboBox?

You SQL code is already getting rid of duplicates, so you're going to have to define in precise terms what you mean by "duplicate" and provide examples.

Too bad you're SQL query doesn't return the catId column from your database. It looks like it would be pretty important to do so.

Also, your variable names suck ass. Use descriptive names, not this query9 crap. All you're doing is making your code harder to debug and maintain by doing what you're doing.