Say I have a DetailsView with a bunch of fields, and I want only certain kinds of users to edit a few of them. They're too few to split them into another DetailsView, so what I'm thinking is to find some way to only allow a user to edit them based on some code-behind logic, effectively making them read-only at will.
I feel it's important to mention that the fields are both TemplateFields, not normal BoundFields with ReadOnly properties.
Any ideas? For some reason the required functions don't jump at me from reading the documentation.
Oh and I need eveyone to see their specific values, I just want to restrict edit access to them.
Hrm apparently it was as simple as setting the EditItemTemplate property of the fields in question to null. Seems to be working fine so far!
Edit: A short code sample showing how I did it:
foreach (DataControlField field in dvDRDetails.Fields)
if (!fieldstoignore.Contains(field.HeaderText))
if (field is TemplateField)
((TemplateField)field).EditItemTemplate = null;
else if (field is BoundField)
((BoundField)field).ReadOnly = true;
Where fieldstoignore is an array of field headers that I always have set as editable. The rest fall in two categories: TemplateField that require the hack I discussed above and BoundField that have a ReadOnly property I can set.
Related
I have a content type with an entity reference field referencing to a custom entity. I need to use a select box because an autocomplete widget is not suitable in my case. However, I cannot load all the entities at once as selectable values because they are too many (72000+ the form won't even load). So I default the entity reference select box to a limited number of values using a views filter and then hide it by default. Then I use an ajax dependent dropdown to show and populate the entity reference select box with filtered down values (I'm using a module that implements hook_form_alter).
My problem is that the form won't validate because now I can select entity reference values which are not the default ones in the select box. So I guess I should control in some way the validation rules of the entity reference field. Is there an easy way to do this? Which hook should I use?
Set the entity reference field to autocomplete and take it out of the process entirely in your form alter with $form['field_entity_ref']['#access'] = FALSE. This should fix the validation problem. (of course, "field_entity_ref" is what I'm calling your actual reference field.
Add your own validation to the form, if that is still necessary.
Finally, implement hook_node_presave() to manually put the value of your custom ajax drop down box.
So if your custom ajax select box was named my_custom_ref, then it would look something like this:
function mymodule_node_presave($node) {
if (isset($node->my_custom_ref)) {
$node->field_entity_ref[$node->language][0]['target_id'] = $node->my_custom_ref;
}
}
In SharePoint I can tee up a binding to an edit field like this below. When the form posts back the changes are automatically persisted to the underlying list item.
<PublishingWebControls:RichHtmlField ID="Field1" FieldName="MySPListItemFieldName" ...
So this works great for RichHtmlFields, but say I've got a Yes/No (boolean) field in the same list item, is there a similar construct to bind that field to a check box control in a similar way?
My goal is to not have to throw down a line of c# to transfer the value of the control to the field, I want it to be automatic like RichHtmlField. It seems like there has to be a straight forward way of doing this since SharePoint does this itself with its internal list item editing page (EditForm.aspx).
What you're after is a BooleanField control on your form:
http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.webcontrols.booleanfield.aspx
Just set the FieldName to that of your Yes/No column, should work fine.
I'm trying to create a comment system just like SO has, but first, I'd like to show first 5 comments for a post and show rest if "display all comments" is clicked for the desired reply.
What is the best way of doing this? I really couldn't found a good way for doing what I want. I must be missing something.
For info, comments datasource is a nested repeater in my page. The outer repeater is replies and inner repeater is comments. Currently I'm binding all comments for all results (even if it has 10000 replies.). Also, I don't want to do paging for comments. I just want it to work the same way as SO.
Any ideas?
EDIT: Now I'm thinking of having 2 tables for comments which are:
A table which only has 5 rows of data and will be visible by default. I need filtering to do this. Linq filtering code would be great!
A table which has all the results. No filtering. I have no problems with this one.
So here is what I have for the data:
DataRowView dv = e.Item.DataItem as DataRowView;
if (dv != null)
{
Repeater commentRepeater = e.Item.FindControl("childRepeater") as Repeater;
if (commentRepeater != null)
{
commentRepeater.DataSource = dv.CreateChildView("myrelation");
commentRepeater.DataBind();
}
}
As you can see, I have created a relation between tables in my dataset and I'm binding that datarow to my repeater. I need to do top 5 filtering on the datarow.
Thank you
I suggest to use JSON returned from ASP.NET Web Services with jQuery.
http://www.mikesdotnetting.com/Article/96/Handling-JSON-Arrays-returned-from-ASP.NET-Web-Services-with-jQuery
http://www.electrictoolbox.com/json-data-jquery-php-mysql/
If you want to append the left over items to the current repeater item you could have a button at the end of the coments that is attached to a jquery function that will fetch the rest of the comments for you. Then once the data is recieved your function would just append the comments to the list of other comments mimicing what the repeater was doing and replacing the 'show all' button.
If you don't want to use any ajax to do this then you will probably need to rebind the comments Repeater with a new set of data that is not limited to just the first 5 results.
EDIT: Based on your comment and changes you have editted, I would go with one table with all comments and in the DataBinding of each comment set the row style to visible with a global counter. Once your have more than 5 set the style to a hidden style for each item. When they click the show all button, just switch the style from hidden to visible for the rest comments that are hidden. This will save you duplicating the data for the first 5 items which could turn into a lot of extra rows if there are a lot of answers with comments.
It is known that the ListView control can't display both an EmptyDataTemplate and a InsertItemTemplate at the same time.
For my design style I need to be able to show both. I want to be able to show that no data exist and at the same time show a form to add new data.
I've already implemented various solutions, such as putting a PlaceHolder in my LayoutTemplate and then manually showing or hiding this PlaceHolder in the code-behind, depending on if there is data or not.
However, I would like a control that has this built-in capability in order to keep my code-behind light.
I believe there are only two ways to achieve what I want:
First way (preferred) is to write that custom control myself. I was thinking of deriving from ListView and overriding the function responsible for disabling the EmptyDataTemplate, but I have no experience with custom controls. And I'm not even sure it will work in the end.
Second way is to use a custom control found or purchased somewhere. I have not been able to find such control that has the same base capabilities as the ListView.
Has anybody any idea how to solve #1 and maybe #2?
Thank you.
Here is what I ended up doing:
public class MyListView : ListView
{
protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
{
int itemCount = base.CreateChildControls(dataSource, dataBinding);
if (this.InsertItemPosition != InsertItemPosition.None && itemCount == 0)
{
CreateEmptyDataItem();
}
return itemCount;
}
}
Works great!
I would go for your option 1: Create a custom control
Because you haven't specified a programming language I made one in VB.NET:
Public Class CustomListView
Inherits ListView
Public Sub CheckEmptyData() Handles Me.PreRender
If Me.Items.Count = 0 Then
Dim label As New Label
label.Text = "No data found <br/>"
Me.Controls.AddAt(0, label)
End If
End Sub
End Class
Just tested it and works perfectly, it can just replace an existing ListView.
As you can see it checks if there is any data and if not it inserts a label with the text "No data found". I haven't found an easy way to use the EmptyDataTemplate for this, that would be a better option but this might already work for you.
Another option is to hide the InsertItem (InsertItemPosition.None) if there is no data, and add a Button "Insert" to the EmptyDataTemplate that enables the InsertItemTemplate and therefore hides the EmptyDataTemplate.
I don't understand much of your requirement without a screen shot of what you are actually trying to achieve. Anyway, you may be able to achieve this interface with a combination of ListView+FormView or ListView+ a User Control. If you can provide any more info I may help further.
I have a web application with a form that has disabled fields in it. It allows a "Save As" function which basically means the settings can be copied into a new configuration (without being modified) and in the new configuration they can be changed to something else. The problem I am running into with this is that since the fields are disabled, they are not getting posted through and do not appear in the context object on the server side.
When I removed the logic to disable the fields, that part works fine. So the remaining problem is, how to "disable" the fields (not allow any change of the data in any of the entry fields) without really "disabling" them (so that the data gets posted through when saving)?
I was originally looking for a way to do this in CSS but not sure if it exists. The best solution is of course, the simplest one. Thanks in advance!
(Note: by 'disabled' I mean "The textboxes display but none of the text inside of them can be modified at all". It does not matter to me whether the cursor appears when you click inside it, though if I had a preference it would be no cursor...)
http://www.w3schools.com/TAGS/att_input_readonly.asp
readonly attribute is what you want.
i would suggest that instead of using the non-updateable field values from the page's inputs, you retrieve the original object from the DB and copy them from there. It's pretty trivial using something like Firebug to modify the contents of the page whose form will be posted back to modify the values, even if they are marked as readonly. Since you really want the values from the original, I would simply reget the object and copy them. Then you don't need to worry about whether the original (and non-updateable) properties get posted back at all.