/// <summary>
/// Returns the collection's items in a DataTable.
/// </summary>
/// <returns></returns>
public DataTable ToDataTable()
{
DataTable tblOut = new DataTable();
// create the columns
ItemType schema = new ItemType();
tblOut.TableName = schema.TableName;
// get the schema from the object
TableSchema.TableColumnSettingCollection settings = schema.GetColumnSettings();
// add the columns
foreach (TableSchema.TableColumnSetting setting in settings)
{
DataColumn col = new DataColumn(setting.ColumnName);
TableSchema.TableColumn tableColumn = schema.GetSchema().GetColumn(setting.ColumnName);
if (tableColumn != null)
{
col.DataType = tableColumn.GetPropertyType();
col.Caption = tableColumn.DisplayName;
col.AllowDBNull = tableColumn.IsNullable;
}
tblOut.Columns.Add(col);
}
// set the values
foreach (ItemType item in this)
{
item.CopyTo(tblOut);
}
return(tblOut);
}
/// <summary>
/// Loops the underlying settings collection to validate type, nullability, and length
/// </summary>
public void ValidateColumnSettings()
{
// loop the current settings and make sure they are valid for their type
foreach (TableSchema.TableColumnSetting setting in GetColumnSettings())
{
Utility.WriteTrace(String.Format("Validating {0}", setting.ColumnName));
object settingValue = setting.CurrentValue;
bool isNullValue = (settingValue == null || settingValue == DBNull.Value);
TableSchema.TableColumn col = table.GetColumn(setting.ColumnName);
if (!col.IsReadOnly)
{
string formattedName = Utility.ParseCamelToProper(col.ColumnName);
Type t = col.GetPropertyType();
//// Convert the existing value to the type for this column
//// if there's an error, report it.
//// OK to bypass if the column is nullable and this setting is null
//// just check for now if the value isn't null - it will be checked
//// later for nullability
if (!col.IsNullable && !isNullValue)
{
try
{
if (col.DataType != DbType.Guid)
{
Convert.ChangeType(settingValue, t);
}
}
catch
{
// there's a conversion problem here
// add it to the Exception List<>
if (col.IsNumeric)
{
errorList.Add(String.Format(InvalidTypeExceptionMessage, formattedName, "number"));
}
else if (col.IsDateTime)
{
errorList.Add(String.Format(InvalidTypeExceptionMessage, formattedName, "date"));
}
else
{
errorList.Add(String.Format(InvalidTypeExceptionMessage, formattedName, "value"));
}
}
}
bool isDbControlledAuditField = (Utility.IsAuditField(col.ColumnName) && !String.IsNullOrEmpty(col.DefaultSetting));
// now make sure that this column's null settings match with what's in the setting
Utility.WriteTrace(String.Format("Testing nullability of {0}", setting.ColumnName));
if (!col.IsNullable && isNullValue && !isDbControlledAuditField)
{
Utility.WriteTrace(String.Format("Null Error Caught {0}", setting.ColumnName));
errorList.Add(String.Format(NullExceptionMessage, formattedName));
}
// finally, check the length
Utility.WriteTrace(String.Format("Testing Max Length of {0}", setting.ColumnName));
if (!isNullValue && col.MaxLength > 0)
{
if (col.DataType != DbType.Boolean && settingValue.ToString().Length > col.MaxLength)
{
Utility.WriteTrace(String.Format("Max Length Exceeded {0} (can't exceed {1}); current value is set to {2}",
col.ColumnName,
col.MaxLength,
settingValue.ToString().Length));
errorList.Add(String.Format(LengthExceptionMessage, formattedName, col.MaxLength));
}
}
}
}
}
