OleDb Excel texte de plus de 255 caractères tronqué
Bonjour,
Tous est dans le titre j'importe des données d'un fichier excel via OleDb cependant, je viens de m'apercevoir que que si une cellule contenait plus de 255 caractère alors celle-ci était tronqué à 255. J'ai fait des recherche pour contourner le problèmes mais je n'ai rien trouvé de concluant. Est ce qu'il y a un moyen d'importer des cellules de plus de 255 caractères ?
Voilà la classe bien utile que j'utilise.
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| #region Imports
using System;
using System.Data;
using System.Data.OleDb;
using System.Diagnostics;
#endregion
/// <summary>
/// A client which interfaces to excel work books
/// </summary>
public class MicrosoftExcelClient
{
#region Variable Declarations
/// <summary>
/// Current message from the client
/// </summary>
string m_CurrentMessage = "";
/// <summary>
/// The file path for the source excel book
/// </summary>
string m_SourceFileName;
/// <summary>
/// Connects to the source excel workbook
/// </summary>
OleDbConnection m_ConnectionToExcelBook;
/// <summary>
/// Reads the data from the document to a System.Data object
/// </summary>
OleDbDataAdapter m_AdapterForExcelBook;
#endregion
#region Constructor Logic
/// <summary>
/// Parameterized constructor .. specifies path
/// </summary>
/// <param name="iSourceFileName">The source filename</param>
public MicrosoftExcelClient(string iSourceFileName)
{
this.m_SourceFileName = iSourceFileName;
}
#endregion
#region Properties
/// <summary>
/// Gets the current messages from the client
/// </summary>
public string CurrentMessage
{
get { return this.m_CurrentMessage; }
}
/// <summary>
/// Property that gets / sets the current source excel book
/// </summary>
public string FileName
{
get { return this.m_SourceFileName; }
set { this.m_SourceFileName = value; }
}
#endregion
#region query methods
/// <summary>
/// Runs a non query database command such as UPDATE , INSERT or DELETE
/// </summary>
/// <param name="iQuery">The required query</param>
/// <returns></returns>
public bool runNonQuery(string iQuery)
{
try
{
//Declares new Command to query
OleDbCommand selectCommand = new OleDbCommand(iQuery);
//Declares new connection to an Excel workbook
selectCommand.Connection = this.m_ConnectionToExcelBook;
//Data adapter
this.m_AdapterForExcelBook = new OleDbDataAdapter();
m_AdapterForExcelBook.UpdateCommand = selectCommand;
selectCommand.ExecuteNonQuery();
return true;
}
catch (Exception ex)
{
this.m_CurrentMessage = "Erreur " + ex.Message;
return false;
}
}
/// <summary>
/// Reads data as per the user query
/// </summary>
/// <param name="iQuery">The speicfic Query</param>
/// <returns>Returns a dataTable, with results from query</returns>
public DataTable readForSpecificQuery(string iQuery)
{
try
{
//Declares new dataTable, which will be returned filled from query
DataTable returnDataObject = new DataTable();
//Command
OleDbCommand selectCommand = new OleDbCommand(iQuery);
selectCommand.Connection = this.m_ConnectionToExcelBook;
//DataAdapter for our excel workbook
this.m_AdapterForExcelBook = new OleDbDataAdapter();
//Applies the Select command to the oledbdataadapter and fills it
this.m_AdapterForExcelBook.SelectCommand = selectCommand;
this.m_AdapterForExcelBook.Fill(returnDataObject);
//Sets a success message if query returned good results
this.m_CurrentMessage = "Succès - " + returnDataObject.Rows.Count + " records importés ";
return returnDataObject;
}
catch (Exception ex)
{
//Displays an error message in the statut bar.
this.m_CurrentMessage = "ERREUR: " + ex.Message;
return null;
}
}
/// <summary>
/// Reads an entire excel sheet from an opened excel workbook
/// </summary>
/// <param name="iSheetName">The name of the excel worksheet</param>
/// <returns>Returns a DataTable filled</returns>
public DataTable readEntireSheet(string iSheetName)
{
try
{
//Declares new DataTable to be returned
DataTable returnDataObject = new DataTable();
//New Command for our Select
OleDbCommand selectCommand = new OleDbCommand("select * from [" + iSheetName + "$]");
selectCommand.Connection = this.m_ConnectionToExcelBook;
this.m_AdapterForExcelBook = new OleDbDataAdapter();
this.m_AdapterForExcelBook.SelectCommand = selectCommand;
this.m_AdapterForExcelBook.Fill(returnDataObject);
this.m_CurrentMessage = "Succès - " + returnDataObject.Rows.Count + " records importés ";
return returnDataObject;
}
catch (Exception ex)
{
//Displays error message
this.m_CurrentMessage = "ERREUR " + ex.Message;
return null;
}
}
#endregion
#region Open read connection
/// <summary>
/// Opens a READ ONLY connection to the source excel document
/// </summary>
/// <returns>Returns nothing</returns>
public void openConnection()
{
String chaineConnexion = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + this.m_SourceFileName + ";Extended Properties=\"Excel 8.0;IMEX=1\"";
try
{
this.m_ConnectionToExcelBook = new OleDbConnection(chaineConnexion);
this.m_ConnectionToExcelBook.Open();
this.m_CurrentMessage = "Succès - La connexion à la source a été établie";
}
catch (Exception ex)
{
//If Excel file didn't open, return an error message
this.m_CurrentMessage = "Erreur lors de l'ouverture du fichier";
}
}
/// <summary>
/// Closes the connection to the source excel document
/// </summary>
/// <returns></returns>
#endregion
#region open write connection
/// <summary>
/// Opens a WRITE connection to the source excel document.
/// </summary>
/// <returns></returns>
public void openWriteConnection()
{
String chaineConnexion = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + this.m_SourceFileName + ";Extended Properties=\"Excel 8.0;IMEX=2\"";
try
{
this.m_ConnectionToExcelBook = new OleDbConnection(chaineConnexion);
this.m_ConnectionToExcelBook.Open();
this.m_CurrentMessage = "Succès - La connexion à la source a été établie";
}
catch (Exception ex)
{
//Error message if connection didn't open
this.m_CurrentMessage = "Erreur lors de l'ouverture du fichier";
}
}
#endregion
#region Close connection
public bool closeConnection()
{
try
{
this.m_ConnectionToExcelBook.Close();
this.m_CurrentMessage = "Succès - Connection fermée";
}
catch (Exception ex)
{
//Error message if closing didn't success
this.m_CurrentMessage = "ERREUR " + ex.Message;
return false;
}
return true;
}
#endregion
} |
Voila le bout de code qui m'affiche mon fichier le fichier Excel dans ma GrindView.
page aspx :
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|
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
Text="valider" /><br /> |
Code behind :
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String TempFileName = "/WINDOWS/Temp/" ;
HttpPostedFile file = Request.Files["FileUpload1"];
file.SaveAs(TempFileName + file.FileName);
Page.Session["fichier1"] = file.FileName;
msExcelClient = new MicrosoftExcelClient(TempFileName + file.FileName);
msExcelClient.openConnection();
DataTable result = msExcelClient.readForSpecificQuery("SELECT * FROM [Catalogue 2009$]");
msExcelClient.closeConnection();
dg.DataSource = result;
dg.DataBind(); |
Je pensais que mes cellules étaient tronquées lors de mon bind() pour alléger l'affichage ou quelque chose du genre mais j'ai essayé d'afficher le contenu de la datatable retourné eet c'est le meme retour tronqué :?...
Merci d'avance pour votre aide.
Cordialement
Pierre
