/// <summary>
/// Sets the fields of the object from a native JET_ENUMCOLUMN struct.
/// </summary>
/// <param name="value">
/// The native enumcolumn to set the values from.
/// </param>
internal void SetFromNativeEnumColumn(NATIVE_ENUMCOLUMN value)
{
this.columnid = new JET_COLUMNID {
Value = value.columnid
};
this.err = (JET_wrn)value.err;
if (JET_wrn.ColumnSingleValue == this.err)
{
this.cbData = checked ((int)value.cbData);
this.pvData = value.pvData;
}
else
{
this.cEnumColumnValue = checked ((int)value.cEnumColumnValue);
this.rgEnumColumnValue = null;
}
}
public void TestSingleValueConversion()
{
var native = new NATIVE_ENUMCOLUMN
{
columnid = 1,
err = (int) JET_wrn.ColumnSingleValue,
cbData = 3,
pvData = new IntPtr(4),
};
var managed = new JET_ENUMCOLUMN();
managed.SetFromNativeEnumColumn(native);
Assert.AreEqual<uint>(1, managed.columnid.Value);
Assert.AreEqual(JET_wrn.ColumnSingleValue, managed.err);
Assert.AreEqual(3, managed.cbData);
Assert.AreEqual(new IntPtr(4), managed.pvData);
}
public void TestMultiValueConversion()
{
var managed = new JET_ENUMCOLUMN();
unsafe
{
var columnvalues = stackalloc NATIVE_ENUMCOLUMNVALUE[2];
var native = new NATIVE_ENUMCOLUMN
{
columnid = 1,
err = (int) JET_wrn.Success,
cEnumColumnValue = 3,
rgEnumColumnValue = columnvalues,
};
managed.SetFromNativeEnumColumn(native);
}
Assert.AreEqual<uint>(1, managed.columnid.Value);
Assert.AreEqual(JET_wrn.Success, managed.err);
Assert.AreEqual(3, managed.cEnumColumnValue);
Assert.AreEqual(null, managed.rgEnumColumnValue);
}
/// <summary>
/// Sets the fields of the object from a native JET_ENUMCOLUMN struct.
/// </summary>
/// <param name="value">
/// The native enumcolumn to set the values from.
/// </param>
internal void SetFromNativeEnumColumn(NATIVE_ENUMCOLUMN value)
{
this.columnid = new JET_COLUMNID { Value = value.columnid };
this.err = (JET_wrn) value.err;
if (JET_wrn.ColumnSingleValue == this.err)
{
this.cbData = checked((int) value.cbData);
this.pvData = value.pvData;
}
else
{
this.cEnumColumnValue = checked((int) value.cEnumColumnValue);
this.rgEnumColumnValue = null;
}
}
public static unsafe extern int JetEnumerateColumns(
IntPtr sesid,
IntPtr tableid,
uint cEnumColumnId,
NATIVE_ENUMCOLUMNID* rgEnumColumnId,
out uint pcEnumColumn,
out NATIVE_ENUMCOLUMN* prgEnumColumn,
JET_PFNREALLOC pfnRealloc,
IntPtr pvReallocContext,
uint cbDataMost,
uint grbit);
