Data Type Mismatch In Criteria Expression?
May 24, 2010
I'm trying to make a search that would list results in an access database which is newer than the date given in the textbox. When i run my sql query and it tries to fill the dataset, i get that data type mismatch error. This is the exact error:
Data type mismatch in criteria expression.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.OleDb.OleDbException: Data type mismatch in criteria expression.
Source Error:
Line 176: OleDbConnection MyConn = new OleDbConnection(ConfigurationSettings.AppSettings["strConn"]);//Luodaan yhteys
Line 177: objCommand = new OleDbDataAdapter(strSQL, MyConn);
Line 178: objCommand.Fill(DataSet1, "Testi"); //Täytetään dataset (fill on DataAdapterin komento), "Testi" on datatablen nimi
Line 179: DataSet1.Tables["Testi"].Columns[0].ReadOnly = true; //Asetetaan ID sarake vain-luku muotoon, ettei avainta pääse muuttamaan
Line 180: DataGrid1.DataSource=DataSet1.Tables["Testi"].DefaultView; //Asetetaan DataSourceksi Datasetin datatable "Testi" johon tiedot on haettu
Source File: c:inetpubwwwrootphoenixsearch.aspx.cs Line: 178
In the access database the date field is of datetime type. The dates are in european DD.MM.YYYY format which i transform using datetime variable and convert function. The sql query runs fine in access database but when i run it thru my oledb connection in my asp.net page it gives me errors. How should i modify my query, or make adjustments to my code, to not get this error? Do i need to send the datetime as a parameter? And how do i do that? Here is the code for the search event:
[Code]....
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Whats The wrong With This Code
Data type mismatch in criteria expression
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Dim con As New OleDb.OleDbConnection(str)
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If con.State = ConnectionState.Closed Then
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Specialization & "','" & Period & "')", con)
adp.ExecuteNonQuery()
con.Close()
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con.Open()
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