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I have databse in access 2007. my date datatype is Date/Time. I have made function to insert values to database. But it is showingd syntax error(missing operation)..." for insering date. Please help me how should i do i have tried hash in front of date and tried to save with …
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I have listbox in c#form in one corner and right corner is blank till i select from listbox. So the problem is If i click outside the listbox it gives null exception error. How can i check if user is not clicking outside the listbox. 
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public string generateInvoiceNo(string PRODUCTNAME) { try { if (con.State != ConnectionState.Open) { con.Open(); string number; OleDbDataAdapter DA1 = new OleDbDataAdapter("SELECT MAX(SUBSTR(INVOICE_NO,9,5)+1) AS MAXINVOICE FROM PRODUCT_DETAILS", con); DataTable DT1 = new DataTable(); DA1.Fill(DT1); if (DT1.Rows.Count > 0) { number = DT1.Rows[0]["MAXINVOICE"].ToString(); } else { number = "00001"; } OleDbCommand cmd2 = … 
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