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Report From: Delphi-BCB/Debugger/Evaluator [ Add a report in this area ]

Report #: 11874

Status: Closed

The Evaluate/Modify window and Hint hangs when evaluating a Field of a ClientDataSet using FieldByName method

Project: Delphi

Build #: 8.1

Version: 7.0

Submitted By: Sistemas de Informaci?n Empresar User

Report Type: Basic functionality failure

Date Reported: 4/6/2005 4:39:45 AM

Severity: Serious / Highly visible problem

Last Updated: 2/9/2006 3:35:56 PM

Platform: All versions

Internal Tracking #:

Resolution: Cannot Reproduce (Resolution Comments)

Resolved in Build: : None

Duplicate of: None

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Description

If you use Dataset.Fields[xxxxx].AsString the correct value gets displayed, but if you try DataSet.FieldByName(FieldName).AsString the Evaluate/Modify windows stops responding.

You can press Ctrl+F2 to End the debugging session.

These symptoms appear after installing d7_ent_upd1_1.exe

Steps to Reproduce:

Create a project that uses a client dataset (in our case we use TClientDataSet, TProvider, TADOQuery, TADOConnection and SQL Server 2000).

Place a breakpoint in a line of code that assings a value to a field of the client dataset.

DataSet.FieldByName('Code').AsString = 'x';

When the debugger stops in the breakpoint, move the mouse cursor over then AsString. The tooltip shows [Evaluating....] but doesn't shows nothing.

If you press Ctrl+F7 and try to evaluate DataSet.Fields[0].AsString, the correct value is shown, but if you try to evaluate DataSet.FieldByName('Code').AsString then window stops responding

In both cases you can stop the debugger with Ctrl+F2

Workarounds

You can modify the source code to store the value in a temp variable, but is a tedious way of debuggiong.

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