/// <summary>
/// Appends data contained in ADO.NET DataTable object to path stored in OutputFileName property.
/// </summary>
/// <param name="dt">DataTable object containing data to be output.</param>
/// <returns>True if output operation is successful. False if write fails.</returns>
public bool AppendDataToOutput(DataTable dt)
{
bool success = true;
PFMsAccess db = null;
try
{
PFDataAccessObjects.AccessVersion accver = this.AccessVersion == enAccessVersion.Access2007 ? PFDataAccessObjects.AccessVersion.Access2007 : PFDataAccessObjects.AccessVersion.Access2003;
if (File.Exists(_outputFileName) == false)
{
PFMsAccess.CreateDatabase(this.OutputFileName, accver, this._replaceExistingFile, this.DbUsername, this.DbPassword);
}
db = new PFMsAccess(this.OutputFileName, this.DbUsername, this.DbPassword);
db.OpenConnection();
dt.TableName = this.TableName;
db.ImportDataFromDataTable(dt);
db.CloseConnection();
}
catch (System.Exception ex)
{
success = false;
_msg.Length = 0;
_msg.Append(AppGlobals.AppMessages.FormatErrorMessage(ex));
throw new System.Exception(_msg.ToString());
}
finally
{
if (db != null)
{
if (db.IsConnected)
{
db.CloseConnection();
}
db = null;
}
}
return(success);
}
/// <summary>
/// Writes data contained in ADO.NET DataTable object to path stored in OutputFileName property.
/// </summary>
/// <param name="dt">DataTable object containing data to be output.</param>
/// <returns>True if output operation is successful. False if write fails.</returns>
public bool WriteDataToOutput(DataTable dt)
{
bool success = true;
PFMsAccess db = null;
try
{
if (File.Exists(_outputFileName))
{
if (_replaceExistingFile)
{
File.SetAttributes(_outputFileName, FileAttributes.Normal);
File.Delete(_outputFileName);
}
}
PFDataAccessObjects.AccessVersion accver = this.AccessVersion == enAccessVersion.Access2007 ? PFDataAccessObjects.AccessVersion.Access2007 : PFDataAccessObjects.AccessVersion.Access2003;
if (File.Exists(_outputFileName) == false)
{
PFMsAccess.CreateDatabase(this.OutputFileName, accver, this._replaceExistingFile, this.DbUsername, this.DbPassword);
}
db = new PFMsAccess(this.OutputFileName, this.DbUsername, this.DbPassword);
db.OpenConnection();
dt.TableName = this.TableName;
if (db.TableExists(this.TableName))
{
if (this.ReplaceExistingTable == false)
{
_msg.Length = 0;
_msg.Append("ERROR: Table ");
_msg.Append(this.TableName);
_msg.Append(" exists and ReplaceExistingTable is False.\r\n");
_msg.Append("Output to Access database will be cancelled without any data output.");
throw new System.Exception(_msg.ToString());
}
bool dropSucceeded = db.DropTable(this.TableName);
if (dropSucceeded == false)
{
_msg.Length = 0;
_msg.Append("ERROR: Attempt to drop existing table ");
_msg.Append(this.TableName);
_msg.Append(" failed.\r\n");
_msg.Append("Output to Access database will be cancelled without any data output.");
throw new System.Exception(_msg.ToString());
}
}
db.CreateTable(dt);
db.ReopenConnection(); //needed to make sure new table exists for subsequent statements
db.ImportDataFromDataTable(dt);
db.CloseConnection();
}
catch (System.Exception ex)
{
success = false;
_msg.Length = 0;
_msg.Append(AppGlobals.AppMessages.FormatErrorMessage(ex));
throw new System.Exception(_msg.ToString());
}
finally
{
if (db != null)
{
if (db.IsConnected)
{
db.CloseConnection();
}
db = null;
}
}
return(success);
}
