public override SpssVariable Clone()
{
SpssDateVariable other = new SpssDateVariable();
CloneTo(other);
return(other);
}
internal static SpssVariable LoadVariable(SpssVariablesCollection parent, string varName, int varType)
{
FormatTypeCode writeFormat, printFormat;
int writeDecimal, writeWidth, printDecimal, printWidth;
SpssException.ThrowOnFailure(SpssSafeWrapper.spssGetVarWriteFormat(parent.Document.Handle, varName, out writeFormat, out writeDecimal, out writeWidth), "spssGetVarWriteFormat");
SpssException.ThrowOnFailure(SpssSafeWrapper.spssGetVarPrintFormat(parent.Document.Handle, varName, out printFormat, out printDecimal, out printWidth), "spssGetVarPrintFormat");
SpssVariable variable;
switch (varType)
{
case 0:
// This may be a date or a numeric
if (SpssDateVariable.IsDateVariable(writeFormat))
variable = new SpssDateVariable(parent, varName, writeFormat, writeWidth, printFormat, printWidth);
else
variable = new SpssNumericVariable(parent, varName, writeFormat, writeDecimal, writeWidth, printFormat, printDecimal, printWidth);
break;
default:
Debug.Assert(varType == printWidth);
variable = new SpssStringVariable(parent, varName, varType);
break;
}
return variable;
}
internal static SpssVariable LoadVariable(SpssVariablesCollection parent, string varName, int varType)
{
FormatTypeCode writeFormat, printFormat;
int writeDecimal, writeWidth, printDecimal, printWidth;
SpssException.ThrowOnFailure(SpssSafeWrapper.spssGetVarWriteFormat(parent.Document.Handle, varName, out writeFormat, out writeDecimal, out writeWidth), "spssGetVarWriteFormat");
SpssException.ThrowOnFailure(SpssSafeWrapper.spssGetVarPrintFormat(parent.Document.Handle, varName, out printFormat, out printDecimal, out printWidth), "spssGetVarPrintFormat");
SpssVariable variable;
switch (varType)
{
case 0:
// This may be a date or a numeric
if (SpssDateVariable.IsDateVariable(writeFormat))
{
variable = new SpssDateVariable(parent, varName, writeFormat, writeWidth, printFormat, printWidth);
}
else
{
variable = new SpssNumericVariable(parent, varName, writeFormat, writeDecimal, writeWidth, printFormat, printDecimal, printWidth);
}
break;
default:
Debug.Assert(varType == printWidth);
variable = new SpssStringVariable(parent, varName, varType);
break;
}
return(variable);
}
/// <summary>
/// Defines the variables in the SPSS data file so that they mirror
/// those defined in a <see cref="DataTable"/>.
/// </summary>
/// <param name="table">
/// The DataTable whose list of columns are the ones we want to copy.
/// </param>
/// <param name="fillInMetadataCallback">
/// The callback method to use to retrieve the additional metadata
/// to put into the SPSS data document, that is not included in a DataTable.
/// Optional.
/// </param>
public void ImportSchema(DataTable table, Action <SpssVariable> fillInMetadataCallback)
{
foreach (DataColumn column in table.Columns)
{
try
{
SpssVariable var;
if (column.DataType == typeof(string))
{
var = new SpssStringVariable();
((SpssStringVariable)var).Length = (column.MaxLength <0 || column.MaxLength> SpssSafeWrapper.SPSS_MAX_LONGSTRING) ? SpssSafeWrapper.SPSS_MAX_LONGSTRING : column.MaxLength;
}
else if (column.DataType == typeof(DateTime))
{
var = new SpssDateVariable();
}
else
{
var = new SpssNumericVariable();
if (column.DataType == typeof(float) || column.DataType == typeof(double))
{
((SpssNumericVariable)var).PrintDecimal = 2;
((SpssNumericVariable)var).WriteDecimal = 2;
}
}
var.Name = this.GenerateColumnName(column.ColumnName);
this.Add(var);
// Provide opportunity for callback function to fill in variable-specific metadata
if (fillInMetadataCallback != null)
{
try
{
fillInMetadataCallback(var);
}
catch (Exception ex)
{
throw new ApplicationException("Exception in metadata filler callback function on column " + column.ColumnName + ".", ex);
}
}
}
catch (Exception ex)
{
throw new ApplicationException("Error adding column " + column.ColumnName + " schema information to the SPSS .SAV data file.", ex);
}
}
}
protected override bool IsApplicableFormatTypeCode(FormatTypeCode formatType)
{
return(formatType != FormatTypeCode.SPSS_FMT_A &&
!SpssDateVariable.IsDateVariable(formatType));
}
public override SpssVariable Clone()
{
SpssDateVariable other = new SpssDateVariable();
CloneTo(other);
return other;
}
