/// <summary>
/// Gets a list of column names or column-definition-strings for the
/// associated view.
/// </summary>
/// <param name="view">the view to that defines the columns</param>
/// <param name="types">true to return types (column definition strings),
/// false to return names</param>
/// <returns>list of column names or types</returns>
private static IList <string> GetViewColumns(View view, bool types)
{
int recordHandle;
int typesFlag = types ? 1 : 0;
uint ret = RemotableNativeMethods.MsiViewGetColumnInfo(
(int)view.Handle, (uint)typesFlag, out recordHandle);
if (ret != 0)
{
throw InstallerException.ExceptionFromReturnCode(ret);
}
using (Record rec = new Record((IntPtr)recordHandle, true, null))
{
int count = rec.FieldCount;
IList <string> columnsList = new List <string>(count);
// Since we must be getting all strings of limited length,
// this code is faster than calling rec.GetString(field).
for (int field = 1; field <= count; field++)
{
uint bufSize = 256;
StringBuilder buf = new StringBuilder((int)bufSize);
ret = RemotableNativeMethods.MsiRecordGetString((int)rec.Handle, (uint)field, buf, ref bufSize);
if (ret != 0)
{
throw InstallerException.ExceptionFromReturnCode(ret);
}
columnsList.Add(buf.ToString());
}
return(columnsList);
}
}
/// <summary>
/// Gets a field value as a string.
/// </summary>
/// <param name="field">Specifies the field to retrieve.</param>
/// <returns>String value of the field, or an empty string if the field is null.</returns>
/// <exception cref="ArgumentOutOfRangeException">The field is less than 0 or greater than the
/// number of fields in the Record.</exception>
/// <remarks><p>
/// Win32 MSI API:
/// <a href="http://msdn.microsoft.com/library/en-us/msi/setup/msirecordgetstring.asp">MsiRecordGetString</a>
/// </p></remarks>
public string GetString(int field)
{
this.CheckRange(field);
StringBuilder buf = new StringBuilder(String.Empty);
uint bufSize = 0;
uint ret = RemotableNativeMethods.MsiRecordGetString((int)this.Handle, (uint)field, buf, ref bufSize);
if (ret == (uint)NativeMethods.Error.MORE_DATA)
{
buf.Capacity = (int)++bufSize;
ret = RemotableNativeMethods.MsiRecordGetString((int)this.Handle, (uint)field, buf, ref bufSize);
}
if (ret != 0)
{
throw InstallerException.ExceptionFromReturnCode(ret);
}
return(buf.ToString());
}
