I encountered a problem in the development, requesting a new purchase request line of a purchase with a legal person with a default value of empty
I tried a variety of methods, the default value can not be overriden.
The following is my code.
[ExtensionOf(formDataSourceStr(PurchReqTable, PurchReqLine))]
final class IWS_PurchReqTable_FDS_Extension
{
public void initValue()
{
next initValue();
//ttsbegin;
PurchReqLine purchReqLine = this.cursor();
purchReqLine.BuyingLegalEntity = 0;
purchReqLine.modifiedField(fieldNum(PurchReqLine,BuyingLegalEntity));
this.rereadReferenceDataSources(); //Refresh value
this.reread();
this.research(1);
FormReferenceGroupControl BuyingLegalEntity = this.formRun().design().controlName(formControlStr(PurchReqTable, PurchReqLine_BuyingLegalEntity));
FormStringControl BuyingLegalEntity_DataArea = this.formRun().design().controlName(formControlStr(PurchReqTable, PurchReqLine_BuyingLegalEntity_DataArea));
BuyingLegalEntity.value(0);
BuyingLegalEntity.resolveChanges();
BuyingLegalEntity.referenceDataSource().research(1);
BuyingLegalEntity.modified();
//BuyingLegalEntity_DataArea.text('');
//BuyingLegalEntity_DataArea.modified();
purchReqLine.BuyingLegalEntity = 0;
purchReqLine.modifiedField(fieldNum(PurchReqLine,BuyingLegalEntity));
//purchReqLine.update();
//purchReqLine.insert();
//this.rereadReferenceDataSources();
//this.refresh();
//this.reread();
//this.resetLine();
//ttscommit;
}
//End
}
It is not totally clear to me what you are trying to do.
Most values are "born" zero or blank and if that is not the case for this field, something else is setting the field, maybe after your code in initValue is called. The cross reference may be of good value here to find the code that references the field.
First of, you should definitely not reference the controls, also calling modifiedField and research from here is a total no-go.
For a start try this:
public void initValue()
{
next initValue();
purchReqLine.BuyingLegalEntity = 0;
}
It simply sets the field to zero. Do not worry about the field control, it will be rendered from the buffer value after the call to initValue.
If that does not solve your problem, something else is setting the field. You can set a breakpoint here, then follow to code until the field is set. Also add the value to the watch list, maybe do conditional debugging.
If another extension for this datasource exist it may override your behaviour as the execution order of extensions is arbitrary.
Related
Im working on a piece of code using DevExpress XAF, I noticed that if im using the event OnSaving that the code executes 2 times, how can i prevent that
protected override void OnSaving()
{
if (PrestamoP != null)
{
PrestamoP.Prestado -= Monto;
PrestamoP.Save();
}
else if (PrestamoG != null)
{
PrestamoG.Prestado -= Monto;
PrestamoG.Save();
}
base.OnSaving();
}
XPO does not guarantee that the OnSaving method is called once. See the corresponding note in the XPO Best Practices article.
I can see that you are changing the PrestamoP.Prestado property based on the value of the Monto property. This code is fine if you execute it only once and only when the Monto property is specified for the first time. This code is not fine if you:
Save this object without changing the Monto property;
Update the early specified Monto value.
So, it appears that a more complex logic is required for the PrestamoG.Prestado property. First, I would move it to the Monto property setter and take the previous value into account (do not forget to check the IsLoading property in this case). Second, I would consider calculating the Prestado value dynamically instead of storing its value. This will allow you to resolve issues with the duplicate business logic execution. See an example here: How to: Calculate a Property Value Based on Values from a Detail Collection.
I can offer different methods for CRUD functions on onSaving method.
IsNewObject, IsDeleted.
// insert
if (Session.IsNewObject(this))
{
a = new a(Session);
a.CreateReferencedProperties(this);
}
// delete
else if (IsDeleted)
{
a= Session.FindObject<A>(PersistentCriteriaEvaluationBehavior.InTransaction, CriteriaOperator.Parse("A=?", this));
if (a!= null)
a.Delete();
}
// update
else
{
a= Session.FindObject<A>(PersistentCriteriaEvaluationBehavior.InTransaction, CriteriaOperator.Parse("A=?", this));
if (a!= null)
a.CreateReferencedProperties(this);
}
You can use the code below to prevent xaf from entering on saving twice.
base.OnSaving();
SessionObjectLayer sessionObjectLayer = this.Session.ObjectLayer as SessionObjectLayer;
if (sessionObjectLayer == null || sessionObjectLayer.ParentSession == null)
{
//Enter only once
}
I am trying to build a dynamic Property Accessor. Want something which is like really fast as close to calling the actually Property. Dont want to go the Reflection route as its very slow. So i opted to using DynamicAssembly and inject IL using ILGenerator. Below is the ILGenerator related code which seems to work
Label nulllabel = getIL.DefineLabel();
Label returnlabel = getIL.DefineLabel();
//_type = targetGetMethod.ReturnType;
if (methods.Count > 0)
{
getIL.DeclareLocal(typeof(object));
getIL.DeclareLocal(typeof(bool));
getIL.Emit(OpCodes.Ldarg_1); //Load the first argument
//(target object)
//Cast to the source type
getIL.Emit(OpCodes.Castclass, this.mTargetType);
//Get the property value
foreach (var methodInfo in methods)
{
getIL.EmitCall(OpCodes.Call, methodInfo, null);
if (methodInfo.ReturnType.IsValueType)
{
getIL.Emit(OpCodes.Box, methodInfo.ReturnType);
//Box if necessary
}
}
getIL.Emit(OpCodes.Stloc_0); //Store it
getIL.Emit(OpCodes.Br_S,returnlabel);
getIL.MarkLabel(nulllabel);
getIL.Emit(OpCodes.Ldnull);
getIL.Emit(OpCodes.Stloc_0);
getIL.MarkLabel(returnlabel);
getIL.Emit(OpCodes.Ldloc_0);
}
else
{
getIL.ThrowException(typeof(MissingMethodException));
}
getIL.Emit(OpCodes.Ret);
So above get the first argument which is the object that contains the property. the methods collection contains the nested property if any. for each property i use EmitCall which puts the the value on the stack and then i try to box it. This works like a charm.
The only issue is if you have a property like Order.Instrument.Symbol.Name and assume that Instrument object is null. Then the code will throw an null object exception.
So this what i did, i introduced a null check
foreach (var methodInfo in methods)
{
getIL.EmitCall(OpCodes.Call, methodInfo, null);
getIL.Emit(OpCodes.Stloc_0);
getIL.Emit(OpCodes.Ldloc_0);
getIL.Emit(OpCodes.Ldnull);
getIL.Emit(OpCodes.Ceq);
getIL.Emit(OpCodes.Stloc_1);
getIL.Emit(OpCodes.Ldloc_1);
getIL.Emit(OpCodes.Brtrue_S, nulllabel);
getIL.Emit(OpCodes.Ldloc_0);
if (methodInfo.ReturnType.IsValueType)
{
getIL.Emit(OpCodes.Box, methodInfo.ReturnType);
//Box if necessary
}
}
Now this code breaks saying That the object/memory is corrupted etc. So what exactly is wrong with this code. Am i missing something here.
Thanks in Advance.
Previously, if you had consecutive properties P returning string and then Q returning int, you would get something like this:
...
call P // returns string
call Q // requires a string on the stack, returns an int
box
...
Now you have something like this:
...
call P // returns string
store // stores to object
... // load, compare to null, etc.
load // loads an *object*
call Q // requires a *string* on the stack
store // stores to object *without boxing*
...
So I see two clear problems:
You are calling methods in such a way that the target is only known to be an object, not a specific type which has that method.
You are not boxing value types before storing them to a local of type object.
These can be solved by reworking your logic slightly. There are also a few other minor details you could clean up:
Rather than ceq followed by brtrue, just use beq.
There's no point in doing Stloc_1 followed by Ldloc_1 rather than just using the value on the stack since that local isn't used anywhere else.
Incorporating these changes, here's what I'd do:
Type finalType = null;
foreach (var methodInfo in methods)
{
finalType = methodInfo.ReturnType;
getIL.EmitCall(OpCodes.Call, methodInfo, null);
if (!finalType.IsValueType)
{
getIL.Emit(OpCodes.Dup);
getIL.Emit(OpCodes.Ldnull);
getIL.Emit(OpCodes.Beq_S, nulllabel);
}
}
if (finalType.IsValueType)
{
getIL.Emit(OpCodes.Box, methodInfo.ReturnType);
//Box if necessary
}
getIL.Emit(OpCodes.Br_S, returnLabel);
getIL.MarkLabel(nulllabel);
getIL.Emit(OpCodes.Pop);
getIL.Emit(OpCodes.Ldnull);
getIL.MarkLabel(returnlabel);
Note that we can get rid of both locals since we now just duplicate the top value on the stack before comparing against null.
I have encountered a problem and I didn't manage to find any soultions yet. Let me simplify things a bit.
I have 2 forms, the first contains an ASP ListBox with multi select mode enabled. I submit the form and in the other form I use just for testing purposes this snippet of code:
protected void Page_Load(object sender, EventArgs e)
{
foreach (string formKey in Request.Form.AllKeys)
{
if (formKey != null)
{
if (formKey.Equals("ctl00$MainContent$ListBox1"))
Label1.Text = Request.Form[formKey];
}
}
}
The problems is that the values that come from the listbox (the values that i selected in the previous form) are separated by "," for ex. "test1,test2,test3". How can i change this separator to "$" for example? I need to change it because the actual values may contain "," and i don't manualy feed them to the listbox.
I can't use any other mode of transfering this values between the form because the entire application uses this model. The values that i get are then sent to a workflow where there will be manipulated and in the workflow i need to know where each listbox item starts and ends so it must be an unique separator.
Any help is apreciated! Thank you very much
Thank you MatteKarla but unfortunately this does not solve my problem. Yes, this is a good way of transfering the values from one form to another.
However i must use the method I described above with Request form keys because the listbox is one of many others "parameters" that are generated at runtime and have their values sent to a workflow method that takes this values. And i can't afford to change that in my application.
My problem is that coma (",") separator is used by default with a multiselect listbox.
I thought that there maybe is a method to change that separator from coma to another char because the coma can also be included in the value itself and this will create confusion.
As i said if i select three values test1, test2 and test3, the result with my method will be a string looking like "test1,test2,test3". However a "test1$test2$test3" would be much better.
But I'm affraid that changing this default separator is not possbile. I must think at a method to overcome this problem like replacing before feeding the listbox all the intended coma from the values with some other char not to create confusion. But this is not a great way of doing it.
On your first page/form (First.aspx.cs) create a public property with the listbox:
public ListBox PostedListBox { get { return ListBox1; } }
Set the postback-url for the button to Second.aspx
Second page in the aspx-file after the #Page-directive add:
<%# PreviousPageType VirtualPath="~/First.aspx" %>
Then in Form_Load on Second.aspx.cs you can extract the values:
if (PreviousPage != null)
{
ListBox postedListbox = PreviousPage.PostedListBox;
foreach (var index in postedListbox.GetSelectedIndices())
{
var itemText = postedListbox.Items[index].Text;
}
}
Or you could just try to locate the control by using:
if (PreviousPage != null)
{
var control = PreviousPage.FindControl("ListBox1") as ListBox;
}
Third Edit:
You could use GetValues:
Request.Form.GetValues("ctl00$MainContent$ListBox1");
returns a string array containing each of the selected items.
I have a UI component that, for various reasons, I have to construct programatically. The component is a table of radio buttons grouped by column.
Right now, I'm constructing the column groups like so:
private function createGroupsForItemList(items: XMLList): void {
for each (var item: XML in items) {
var rbGroup: RadioButtonGroup = new RadioButtonGroup();
groups[item.#level.toString()] = rbGroup;
}
}
I'm trying to associate the RadioButton instances with the column groups like so:
private function createValueControl(item: XML): UIComponent {
var control: RadioButton = new RadioButton();
control.label = "";
control.group = groups[item.#level.toString()];
control.addEventListener(Event.SELECT, updateSelection);
return control;
}
I can see in the debugger that the control has an association to the group:
control.group == groups[item.#level.toString()]
However, I can see equally that the group does not know anything about the control:
group.radioButtons.length == 0
I imagine that this is because the setter for group in RadioButton is a dumb setter; all it does is copy to the variable, which doesn't do the magic that groupName does. However, I can't seem to find the value I should use to set the RadioButton.groupName property correctly.
So, in short, I'm stumped on how to get these bits to talk to each other. How do I do this?
-- EDIT --
It turns out that I can have the groups created and associated simply by setting the groupName property, but I can't get at the group to set up a selection listener; the group is NULL immediately after the setting process, which means that the second line below throws the Flex equivalent of an NPE:
control.groupName = groupNameForLevel(item);
control.group.addEventListener(Event.SELECT, updateSelection);
First instinct is that this issue has to do with invalidateDisplayList and when and how that is called. Of course, since issues related to that function are behind a number of Flex's quirks, I may just be scapegoating.
This is not the answer to your question per se, but it seems like it might actually work as an alternate solution.
RadioButtonGroups will initialize based on a IFlexDisplayObject. This means that you can do something like:
var c:HBox = new HBox();
var rbg:RadioButtonGroup = new RadioButtonGroup( c );
// do stuff with rbg.
c.addChild( new RadioButton() );
The problem is that it may not be the most practical answer, but it has the decided benefit of being a workable solution.
Setting groupName should work.
All I can suggest is to step through the group() getter of the RadioButton component and see where exactly it is failing. Are you programmatically creating the group too? If that's the case, maybe it isn't initialized fully yet.
I'm working on a web application that renders a reporting services report as a PDF and one of my requirements is to allow for multiple locations to be included on the same report. To handle this, I have created a multi-value report parameter which seems to do the trick when using the RS UI, etc. But, I am using the webservice for reporting services and cannot for the life of me figure out how to set the value of the parameter to be identified as having multiple values.
I've tried simply setting it as "LOC1,LOC2", but that is being picked up as a single value. I have also tried "LOC1" + System.Environment.NewLine + "Loc2".
You can send it through as a comma-delimited string if you're willing to parse it on the other end. A lot of languages have a String.Split(",") style method you can use for that.
Either that, or you can construct an array (or list, or collection) and pass that through as the parameter, though this would involve changing the contract on the webservice method.
Figured it out, you have to each value separately under the same name, snippet:
//Register parameters
ArrayList<ParameterValue> parmValues;
for(Map.Entry<String,String> entry:reportParams.entrySet()) {
//is it multi-value?
if(entry.getValue().contains(",")) {
//yes, add multiple ParameterValues under the same name
// with each different value
for(String mval:entry.getValue().split(",")) {
ParameterValue pv = new ParameterValue();
pv.setName(entry.getKey());
pv.setValue(mval.trim());
parmValues.add(pv);
}
} else {
//no, just a single value
ParameterValue pv = new ParameterValue();
pv.setName(entry.getKey());
pv.setValue(entry.getValue());
parmValues.add(pv);
}
}