Problems using GetAttribute and SetAttribute of the IAttributeAcces sor interface with web controls

[duff]

Hiya,

I'm trying to replace the commented out code below with a neater
version using the IAttributeAcces sor interface (so that I don't have to
write 'if' statements for all control types).

At the moment this doen't work. The test line I put in

(string s = ControlAttribut es.string s = ControlAttribut es.GetAttribute
("Text");

is giving me s as null. Neither the GetAttribute nor the SetAttrubute
fail - they just don't seem to do anything.

Any clues what I'm doing wrong?

Kirsty
_______________ _______________ _____

public void SetCaptions
(
System.Web.UI.H tmlControls.Htm lForm WebForm,
System.Data.Dat aSet Captions
)
{
System.Data.Dat aTable CaptionDataTabl e = new System.Data.Dat aTable();
string ControlName = "";
string ControlText = "";
System.Web.UI.C ontrol Control;

// Get the captions data table from the dataset
CaptionDataTabl e = Captions.Tables[_CaptionDataTab leName];

// Go through the data, setting the Text property of each control
foreach (System.Data.Da taRow Row in CaptionDataTabl e.Rows)
{
ControlName = Row[_ControlNameFie ldName].ToString();
ControlText = Row[_ControlCaption FieldName].ToString();
Control = WebForm.FindCon trol (ControlName);

if (!(Control == null))
{
System.Web.UI.I AttributeAccess or ControlAttribut es =
(System.Web.UI. IAttributeAcces sor)Control;
string s = ControlAttribut es.GetAttribute ("Text");
ControlAttribut es.SetAttribute ("Text",Control Text);
// if (Control is System.Web.UI.W ebControls.Labe l)
// {
// System.Web.UI.W ebControls.Labe l Lbl =
(System.Web.UI. WebControls.Lab el)Control;
// Lbl.Text = ControlText;
// } // (ControlType is System.Web.UI.W ebControls.Labe l)

} //(!(Control ==null))
} //foreach

} //SetCaptions

[William F. Robertson, Jr.]

From the help page for IAttributeAcces sor

http://msdn.microsoft.com/library/de...classtopic.asp

"Defines methods used by ASP.NET server controls to provide programmatic
access to any attribute declared in the opening tag of a server control."

If you were too look at your label control that was rendered to the browser
you would probably see

<span Text=""></span>

When you are calling the GetAttribute( "Text" ) there is not a client side
text attribute defined yet.

To accomplish this you will need to use reflection.

Control = WebForm.FindCon trol (ControlName);

if ( Control != null ) {
Type t = Control.GetType ();
System.Reflecti on.PropertyInfo info = t.GetProperty( "Text" ); //gets the
property called Text if it exists on the control.

if ( info != null ) //this will actually set the Text property of all
controls that have one
info.SetValue( Control, LabelText, null );
}

You are confusing client side attributes with class properties.

HTH,

bil

<du**@netcomuk. co.uk> wrote in message
news:11******** **************@ z14g2000cwz.goo glegroups.com.. .

Hiya,

I'm trying to replace the commented out code below with a neater
version using the IAttributeAcces sor interface (so that I don't have to
write 'if' statements for all control types).

At the moment this doen't work. The test line I put in

(string s = ControlAttribut es.string s = ControlAttribut es.GetAttribute
("Text");

is giving me s as null. Neither the GetAttribute nor the SetAttrubute
fail - they just don't seem to do anything.

Any clues what I'm doing wrong?

Kirsty
_______________ _______________ _____

public void SetCaptions
(
System.Web.UI.H tmlControls.Htm lForm WebForm,
System.Data.Dat aSet Captions
)
{
System.Data.Dat aTable CaptionDataTabl e = new System.Data.Dat aTable();
string ControlName = "";
string ControlText = "";
System.Web.UI.C ontrol Control;

// Get the captions data table from the dataset
CaptionDataTabl e = Captions.Tables[_CaptionDataTab leName];

// Go through the data, setting the Text property of each control
foreach (System.Data.Da taRow Row in CaptionDataTabl e.Rows)
{
ControlName = Row[_ControlNameFie ldName].ToString();
ControlText = Row[_ControlCaption FieldName].ToString();
Control = WebForm.FindCon trol (ControlName);

if (!(Control == null))
{
System.Web.UI.I AttributeAccess or ControlAttribut es =
(System.Web.UI. IAttributeAcces sor)Control;
string s = ControlAttribut es.GetAttribute ("Text");
ControlAttribut es.SetAttribute ("Text",Control Text);
// if (Control is System.Web.UI.W ebControls.Labe l)
// {
// System.Web.UI.W ebControls.Labe l Lbl =
(System.Web.UI. WebControls.Lab el)Control;
// Lbl.Text = ControlText;
// } // (ControlType is System.Web.UI.W ebControls.Labe l)

} //(!(Control ==null))
} //foreach

} //SetCaptions

[Bruce Barker]

thats because the Text property of a Label is not an attribute. if you look
at the rendered html, you should see something like:

<span Text="valueOf Controltext" id="labelname"> </span>

where your code added the Text attribute (meanless to the browser)

-- bruce (sqlwork.com)
<du**@netcomuk. co.uk> wrote in message
news:11******** **************@ z14g2000cwz.goo glegroups.com.. .

Hiya,

I'm trying to replace the commented out code below with a neater
version using the IAttributeAcces sor interface (so that I don't have to
write 'if' statements for all control types).

At the moment this doen't work. The test line I put in

(string s = ControlAttribut es.string s = ControlAttribut es.GetAttribute
("Text");

is giving me s as null. Neither the GetAttribute nor the SetAttrubute
fail - they just don't seem to do anything.

Any clues what I'm doing wrong?

Kirsty
_______________ _______________ _____

public void SetCaptions
(
System.Web.UI.H tmlControls.Htm lForm WebForm,
System.Data.Dat aSet Captions
)
{
System.Data.Dat aTable CaptionDataTabl e = new System.Data.Dat aTable();
string ControlName = "";
string ControlText = "";
System.Web.UI.C ontrol Control;

// Get the captions data table from the dataset
CaptionDataTabl e = Captions.Tables[_CaptionDataTab leName];

// Go through the data, setting the Text property of each control
foreach (System.Data.Da taRow Row in CaptionDataTabl e.Rows)
{
ControlName = Row[_ControlNameFie ldName].ToString();
ControlText = Row[_ControlCaption FieldName].ToString();
Control = WebForm.FindCon trol (ControlName);

if (!(Control == null))
{
System.Web.UI.I AttributeAccess or ControlAttribut es =
(System.Web.UI. IAttributeAcces sor)Control;
string s = ControlAttribut es.GetAttribute ("Text");
ControlAttribut es.SetAttribute ("Text",Control Text);
// if (Control is System.Web.UI.W ebControls.Labe l)
// {
// System.Web.UI.W ebControls.Labe l Lbl =
(System.Web.UI. WebControls.Lab el)Control;
// Lbl.Text = ControlText;
// } // (ControlType is System.Web.UI.W ebControls.Labe l)

} //(!(Control ==null))
} //foreach

} //SetCaptions

[k]

Thanks to you both for correcting my bit of Friday afternoon confusion.

Kirsty