about variable

[Jie]

Hi ,everyOne:
i has a question, please help me.

string strBB = "Hello World!";
string strAA = "strBB"
how can i just know about strAA's value, to get the strbb's Value????
like the controls can use findControls("objName")!

Please Help me!

[Peter Bromberg [C# MVP]]

Jie,
This does not make sense. You are setting string strAA to a literal string
of "strBB".
if you set strAA to strBB (e.g., string strAA = strBB ) then you have two
completely separate strings strAA and strBB, both with the value "Hello
World". Strings are immutable. What's the goal here?
Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com


"Jie" wrote:

Hi ,everyOne:
i has a question, please help me.

string strBB = "Hello World!";
string strAA = "strBB"
how can i just know about strAA's value, to get the strbb's Value????
like the controls can use findControls("objName")!

Please Help me!

[sloan]

You can start down this road:

This was a (from)C# translation, but I don't have the C# with me at the
moment.
Private Function MatchPropertyNonString(ByVal obj As Object, ByVal
propertyName As String, ByVal value As Object) As Boolean
Dim match As Boolean = False
Dim propertyInfo As propertyInfo =
obj.GetType.GetProperty(propertyName)
If (Not (propertyInfo) Is Nothing) Then
Try
Dim target As Object = propertyInfo.GetValue(obj, Nothing)

'Now return whether the property matches or not
'Notice the equals takes any object type as a parameter
match = target.Equals(value)

Return match

Catch ex As Exception
Dim e As String = ex.Message
End Try
End If
Return match
End Function

Strings are trickier, because you may want to trim them, or use or not use
case sensitivity.


"Jie" <wj***@21cn.comwrote in message
news:eo*************@TK2MSFTNGP02.phx.gbl...

Hi ,everyOne:
i has a question, please help me.

string strBB = "Hello World!";
string strAA = "strBB"
how can i just know about strAA's value, to get the strbb's Value????
like the controls can use findControls("objName")!

Please Help me!

[Paul E Collins]

sloan wrote:

You can start down this road:
[evil reflection stuff]

Gah. Now he's actually going to use that in a program.

Eq.

[Marc Gravell]

[evil reflection stuff]

Gah. Now he's actually going to use that in a program.

Agreed; almost /any/ other soltion would be preferable... alternatives;
my preference between a and b would depend on the number of "variables"
to track; if low, a; if high b. The third (c) is just an "a.n.other"
option.

a: a switch block that considers a number of known names
b: a property bag - for instance a Dictionary<string,stringthat you
could use to say someValues["nameA"]="valueB";
and
string value = someValues["nameA"];
c: databinding directly to a UI by property (not field or variable)
name; still reflection under the bonnet, but less chances to get it
wrong
d: anything

Or suchlike.

Marc