/// <summary>
/// Allow the user to change a String to a NText, although this may affect performance.
/// </summary>
/// <param name="outputID"></param>
/// <param name="outputColumnID"></param>
/// <param name="dataType"></param>
/// <param name="length"></param>
/// <param name="precision"></param>
/// <param name="scale"></param>
/// <param name="codePage"></param>
public override void SetOutputColumnDataTypeProperties(int outputID, int outputColumnID, Microsoft.SqlServer.Dts.Runtime.Wrapper.DataType dataType, int length, int precision, int scale, int codePage)
{
var outputColl = this.ComponentMetaData.OutputCollection;
IDTSOutput output = outputColl.GetObjectByID(outputID);
var columnColl = output.OutputColumnCollection;
IDTSOutputColumn column = columnColl.GetObjectByID(outputColumnID);
var sourceColl = output.ExternalMetadataColumnCollection;
IDTSExternalMetadataColumn columnSource = sourceColl.GetObjectByID(column.ExternalMetadataColumnID);
if (((column.DataType == DataType.DT_WSTR) || (column.DataType == DataType.DT_NTEXT)) &&
((dataType == DataType.DT_NTEXT) || (dataType == DataType.DT_WSTR)))
{
column.SetDataTypeProperties(dataType, length, precision, scale, codePage);
}
else
{
base.SetOutputColumnDataTypeProperties(outputID, outputColumnID, dataType, length, precision, scale, codePage);
}
}
/// <summary>
/// Connects to SharePoint and gets any columns on the target
/// </summary>
/// <param name="output"></param>
/// <param name="p"></param>
private void CreateExternalMetaDataColumns(
IDTSOutput output, string sharepointUrl, string listName, string viewName,
Dictionary <string, string> existingColumnData)
{
// No need to load if the Url is bad.
if ((sharepointUrl == null) || (sharepointUrl.Length == 0))
{
return;
}
// Need a list to continue
if ((listName == null) || (listName.Length == 0))
{
return;
}
// If the list has changed, then we do not want any of the exisiting column data to
// influence it (provides a way to actually reset the names if needed)
if (output.Description != listName)
{
existingColumnData.Clear();
output.Description = listName;
}
try
{
List <SharePointUtility.DataObject.ColumnData> accessibleColumns =
GetAccessibleSharePointColumns(sharepointUrl, listName, viewName);
foreach (var column in accessibleColumns)
{
// Setup the primary column details from the List
IDTSExternalMetadataColumn dtsColumnMeta = output.ExternalMetadataColumnCollection.New();
if (existingColumnData.ContainsKey(column.Name))
{
dtsColumnMeta.Name = existingColumnData[column.Name];
}
else
{
dtsColumnMeta.Name = column.FriendlyName;
}
dtsColumnMeta.Description = column.DisplayName;
dtsColumnMeta.Length = 0;
dtsColumnMeta.Precision = 0;
dtsColumnMeta.Scale = 0;
if ("Boolean|AllDayEvent|Attachments|CrossProjectLink|Recurrence".Contains(column.SharePointType))
{
dtsColumnMeta.DataType = DataType.DT_BOOL;
}
else if (column.SharePointType == "DateTime")
{
dtsColumnMeta.DataType = DataType.DT_DBTIMESTAMP;
}
else if ("Number|Currency".Contains(column.SharePointType))
{
// Max = 100,000,000,000.00000
dtsColumnMeta.DataType = DataType.DT_R8;
}
else if ("Counter|Integer".Contains(column.SharePointType))
{
dtsColumnMeta.DataType = DataType.DT_I4;
}
else if ("Guid".Contains(column.SharePointType))
{
dtsColumnMeta.DataType = DataType.DT_GUID;
}
else
{
if (column.MaxLength == -1)
{
dtsColumnMeta.DataType = DataType.DT_NTEXT;
dtsColumnMeta.Length = 0;
}
else
{
dtsColumnMeta.DataType = DataType.DT_WSTR;
dtsColumnMeta.Length = column.MaxLength;
}
}
IDTSCustomProperty fieldNameMeta = dtsColumnMeta.CustomPropertyCollection.New();
fieldNameMeta.Name = "Id";
fieldNameMeta.Description = "SharePoint ID";
fieldNameMeta.Value = column.Name;
// Create default output columns for all of the fields returned and link to the original columns
IDTSOutputColumn dtsColumn = output.OutputColumnCollection.New();
dtsColumn.Name = dtsColumnMeta.Name;
dtsColumn.Description = dtsColumnMeta.Description;
dtsColumn.ExternalMetadataColumnID = dtsColumnMeta.ID;
IDTSCustomProperty fieldName = dtsColumn.CustomPropertyCollection.New();
fieldName.Name = fieldNameMeta.Name;
fieldName.Description = fieldNameMeta.Description;
fieldName.Value = fieldNameMeta.Value;
dtsColumn.SetDataTypeProperties(
dtsColumnMeta.DataType, dtsColumnMeta.Length, dtsColumnMeta.Precision, dtsColumnMeta.Scale, 0);
}
}
catch (ApplicationException)
{
// Exception happened, so clear the columns, which will invalidate this object.
output.ExternalMetadataColumnCollection.RemoveAll();
}
}
