I've been quite impressed with dynamic data and how easy and quick it is to get a simple site up and running. I'm planning on using it for a simple internal HR admin site for registering people's skills/degrees/etc.
I've been watching the intro videos at www.asp.net/dynamicdata and one thing they never mention is how to handle concurrency control.
It seems that DD does not handle it right out of the box (unless there is some setting I haven't seen) as I manually generated a change conflict exception and the app failed without any user friendly message.
Anybody know if DD handles it out of the box? Or do you have to somehow build it into the site?
I have an application, that is accessing by number of users at the same time. Those users, who are accessing the application getting the same id. Here what i am doing in the code is, when they are creating new user i am getting a max id from DB and increasing the value to 1. So that they are getting same ID. so that i am facing concurrency in this situation. How to solve this problem. I need to display different numbers when the users click on NewUser. I am using SQL server 2008 and .NET 3.5 and C#.NET
I am trying to handle concurrency in my application. Basically if user A has a support ticket open which currently has a status of 'Active' and user 'B' opens the same ticket and closes it (changing its status to closed), I would expect a confict execepton to be thown when user 'A' tries to close the support ticket. For some reason this is not happening. I have checked that Update check is set to 'Always' in the dbml file. Here is an exerpt of my code. // Update 'Active' lead to 'Close'
I have the following problem:- I have a Settings table which has a value column, that is incremented everytime a Job is created (I use Entity framework to add the job and to update the value increment). So, I have something like this:
[Code]....
The problem is: I have a asp.net with concurrent calls to SaveJob Method. In this code, the value is shared, and if I call SaveJob 5 times for instance, the value column is 3, because the scope is not "locking" the other transactions until It's done, and the value is shared. I want to have the following scenario: Call SaveJob 5 times;Value column in Settings table is 5;Call SaveJob 3 more times;Value Column in Settings table is 8. I tried to implement something like pessimistic concurrency in EF, but I had no success. Whats the best way to handle that without using SQL Server queries directly? (like 'lock' and 'unlock' etc)
Actaully i developed an Asp.net website which has a PDA app part. The case is that employees from company come in the morning and get data in their PDA's and they work on them the whole day and in Evening they again come to office or from any web access they update the data on server. We did this through Web services because web services are remote methods so they could access that by only web access..
Now the problem is Concurrency that while syncing through web servies how to control Concurrency however their could be many employee who try to update data at a time.In web servies we receive DataTable from PDA application and do update or insert operations through LINQ with Sql Server.
I have an aspx webpage in which an user control is added dynamically as follows:
UserControl testUsrControl = LoadControl("TestUsrControl") as UserControl; testUsrControl.ID ="test";
Then I tried adding an event handler of user control inside aspx like below:
testUsrControl.Drpdatafield_SelectIndexChanged += new EventHandler(this.Drpdatafield_SelectIndexChanged);
But this line is giving error at **testUsrControl.Drpdatafield_SelectIndexChanged **. The error is "Drpdatafield_SelectIndexChanged" doesn't exist in UserControl.How can get the testUsrControl's events inside aspx page dynamically.
Made my first application in aspx, and connect to mysql, the issue is how concurrency control (transactions), ie that when users log dam not, nor information loss...
I added a column of type "timestamp" to a table in SQL Server to use for concurrency control. I deleted all my tables from the Linq surface and then added them back. I see that the "Time Stamp" attribute is set to True for the timestamp column and False for all the other columns. I also see that the "Update Check" attribute is set to Never for all columns, including the timestamp column.
After watching some demo videos and reading some tutorials, I had expected to have to manually set the "Update Check" attribute values on the columns - to Never for all columns but the timestamnp column where it should be set to Always. But, before setting the "Update Check" to Always on the timestamp column, I decided to test it the way it was, and Linq seems to be doing the right thing - it seems to be using the timestamp column for concurrency control correctly even with "Update Check" set to Never on the timestamp column.
So my question is - does the fact that "Time Stamp" is set to True trump the "Update Check"? Or is there any other reason one could or should set "Update Check" to Always on a timestamp column? Is there any change in behavior?
I need to create a dynamic form using the already existing DB entries, from 3 different tables. I am trying to do this by inheriting ViewModel class, which is comprised of all the model instances (or List of instances of unknown count) within it.
When I inherit the ViewModel in the View Template, the dynamic form gets generated without any issues, and looks fine. The dynamic form is generated based on iterating over the calls for each required model instance in the ViewModel passed to the View.Each call uses a partial view of the instance to generate the form, and hence multiple iterations create multiple instances of the form.
[Code]....
However, when I try to submit the form, the postback does not include the ViewModel object, but rather only the first model instance used in the form.
1) Accpet the item in TxtItem in comma seperated values like (Apple, Mango, Orange etc.). Store that item in array object (objArray) in acending order."
2) Create the object of the dropdown list objDropDwon on runtime and fill its items from objArray."
3) Create server side table and add rows on runtime."
4) Add objDropDown to the each row of the table."
5) Handle Selected index changed event. Display the current selected name on screen
Note: give me code guide how can done 1 to 5 step.
I am working on a project in ASP.Net MVC3 and this model of development is quite new to me, but I think I am starting to get the hang of it.
In my project, I am creating a dynamic array of <input type="check"... Checkboxes. From my understanding, when sending form data it should be processed in the Controller using <form method="post"....
So my question is: what is the best way to go about consuming a dynamic amount of HTML objects sent in the post data? What I am doing right now is looping through all the controls sent VIA: post and parsing the dynamic ones by the ID name. This method seems highly suspect in terms of coding practice. It does work, but I am wondering what the "norm" is for this sort of proceedure?
I had been created some dynamic radio buttons in a loop inside a dinamy table which is inside an UpdatePanel , but i can not handle the events my code is below:
public void MetodoCreacion() { RadioButton RBtn = null; Table table = new Table(); TableRow row = null; TableCell cell = null; for (int i = 0; i < 5; i++) { row = new TableRow(); cell = new TableCell(); RBtn = new RadioButton(); RBtn.ID = "RBGN_" + i.ToString(); RBtn.GroupName = "RBGN1"; RBtn.Text = "Opcion " + i.ToString(); RBtn.CheckedChanged += new EventHandler(RBtn_CheckedChanged); RBtn.AutoPostBack = true; cell.Controls.Add(RBtn); row.Controls.Add(cell); table.Controls.Add(row); } UpdatePanel1_UpdatePanelAnimationExtender.Controls .Add(table); } public void RBtn_CheckedChanged (object sender, EventArgs e) { Label1.Text = ((RadioButton)sender).ID; }
I've got a detailsview control on a page. The table that it interacts with has a DateTime column in it. This column is nullable, and a lot of the records have null for that value. In the EditItemTemplate I've got a calendar control. When I try to put the DetailsView into edit mode, I get the following error message:
System.InvalidCastException was unhandled by user code Message=Specified cast is not valid. Source=App_Web_srpmlyjd StackTrace: at ASP.entries_aspx.__DataBinding__control44(Object sender, EventArgs e) in c:inetpubwwwrootMediaLibraryEntries.aspx:line 103 at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren()
I am convinced that the problem is the null values in the DateTime column of the table. I've done some web searches on this, and some have suggested placing some dummy values into that column, but that seems more like a kludge, rather than a solution. How do I keep nulls in the table, and yet not have that preceeding error come up when a user tries to edit the selected record?
I have GridView control and assosiated DetailView control.
When the record form GridView is seleted, I am showing the details on DetailView.
I have set the Auto generated delete button to true. And now I want to delete the record when someone clicks the Delete button from DetailView control.
I have some data which contains angle brackets in some of the fields.Even if properly escaped as <: or > (or even the hex codes), in Visual Studio 2005 ASP.Net, the field data is being truncated at the first angle bracket. If I replace the data with curly braces
<ITReview><row TopNode="REQ 123456 TT Description <Date sent to app dev> <Priority> <SubTask Status>"/><row TopNode="REQ 456789 TT Description <Date sent to app dev> <Priority> <SubTask Status>"/></ITReview><ITReview><row TopNode="REQ 123456 TT Description <Date sent to app dev> <Priority> <SubTask Status>"/><row TopNode="REQ 456789 TT Description <Date sent to app dev> <Priority> <SubTask Status>"/></ITReview>
I want to bind data from database to Dynamic Grid-view Control with textbox and dropdown using dataset.
I have successfully inserted data to database using this code but now i want to fetch inserted data to same grud view control. i have tried following code. but not getting ans.
SetInitialRow(); string ID = 101; foreach (GridViewRow row in Gridview2.Rows) { string str1 = "Select * from VendorInvoiceDetails where Invoice_ID='" + ID + "'"; DataSet ds1 = GEN.GetDataByQuery(str1);
In the detailsview, I set a edit item template (a bounded dropdownlist control). But in database there are some data not set to a value (null). After clicking edit button in detailsview control I get the error about the value problem (Because after populating the dropdownlist, there is no item as null in it. )How to set dropdownlist selected index when the data is "null"?
My project includes a grid view with some updtable fields, some fields throw an error on update and some do not and it does not really make sense. WORK_STATION_ID does not cause an error, ROOM _ID cause an error, both are int? (I am using c#) and for update I use the code liste below.
when a user select a room i want that it lockes and an other person can not select it.
i think it`s better that i have a flag in my table and when a user select room value of is false and if cancle reservation ,i changed it true.an other person can see room that they have true value .
I want to know how to handle the concurrency throughy code ? ie: I want to access the Concurrency issue or error ? Because if i get the concurrency user or issue I have to do some manipulation.
MVC Application should allow users to edit, add, delete, save, filter, sort, paginate in DataGrid.
Data is stored in SQL server tables.
Columns and column widths which appear in DataGrid are defined at runtime. Views should create editable DataGrids at runtime using this definition table.
Which free DataGrid control is best for this ? Where to find sample code to implement this in MVC ?
I am using DataAnnotations to supply information for Inserting/Editing data into a grid. Is there a way to control the Html attributes of the DisplayNames I use, so that, for instance, the DisplayNames can be a different color from the text in the textboxes?
