I want to update object via entity framework
For example I have to changed object:
Obj1
Obj2
I want to save change to the Obj1 Only
[code]....
I try to Save with ApplyPropertyChanges but the data didn't saved
How can I update object?
Currently I update a single item in a database as follows:
var master = (from tmi in db._Masters where tmi.Id == Id select tmi).FirstOrDefault();
master.logPosition++;
db.SubmitChanges();
This strikes me as inefficient, as (I think) I am pulling out a full DB row to just update a single value. Is there a more efficient query I can use?
I've got a single table, with project information and schedule information. To make the data easier to present, I created a tab control with two panels (a detailsview in each). The first tab is for project info, the second tab is for schedule info (again, all fields in the same table). The problem is, if i change info in both tabs, and then hit the update button, only the data from one tab is added to the table. I think this problem is simple to fix, and boils down to the way I have the page organized, but I can't quite figure it out.
I've boiled my code down to the following conceptualized structure:
[code]....
When you click the update button, you return to the listview, but with only the information from your current tab saved. How can I get it to update from both detailsviews?
i got a problem to update my database which i bounded to datagrid. The problem is, i want to update my database only by clicking one update button at the bottom.. when the user click it, all the fields will be updated to database.
View 3 RepliesI want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 Repliesnet.3.5 linq 2 sql
if i need to update a single field in the db table - do i need to select all the row first?
can i say update myTable Field2 = x where field1=y?
dont know its look like too mach recourses
Order order =new ();
order.ID = 1; orderStatus = "test";
db.order.attach(order);
db.Refresh(RefreshMode.KeepCurrentValues, oOrder);
db.SubmitChanges();
well that delete all the other fields values
I am having a hard time attempting to update a single field without having to retrieve the whole record prior to saving.
For example, in my web application I have an in place editor for the Name and Description fields of an object. Once you edit either field, it sends the new field (with the object's ID value) to the web server. What I want is the webserver to take that value and ID and only update the one field. There are only two ways google tells me to do this:
1) When I get the value I want to change, the value and the ID, retrieve the record from the database, update the field in the c# object, and then send it back to the server. I don't like this method because not only does it include a completely unnecessary database read call (which includes two tables due to the way my schema is).
2) Set UpdateCheck for all the fields (but the primary keys) to UpdateCheck.Never. This doesn't work for me (I think) due to my mapping layer between the Linq to Sql and my Entity/ViewModel layer. When I convert my entity into the linq to sql db object it seems to be updating those fields regardless of the UpdateCheck setting. This might be just because of integers, since not setting an int means it is a zero (and no, I can't use int? instead).
I have a datatable with some records.
i want that if record id is exists in database then update the record otherwise insert the record.
But i don't want to hit database again and again, i want to accomplish the task on a single hit.
i develop a c# windows application. My database is sql server 2008 exp. i want lock single row for user select it for update. for example;
userA - Connection a (connection id 52);
user select a single row (select * from t1 with(rowlock?, updlock?,or what) where id=1) and bind data to form fields (texbox, checkbox,combobox etc.). (there is no problem)
userB - Connection b (connection id 54);
userB can select all other rows from t1 (where id=2 or 3 or anything) but not id=1. when userB select * from t1 where id=1 system generate an exception with (you cannot select this row because it is updated. Updated users connection id is 52.)
when userA (connectionid52) close form or commit changes then userB can select id=1.
i am read few documents (transacions, rowlock,updlock, concurrency violation optimistic,pessimistic) but i couldn't understand.
I for a page with multiple update panel in parent page, I got a button that will open a child window, after I close the child window, how can I refresh the parent page? And I only want to refresh a single update panel section instead of all other update panel section.
View 1 RepliesI'm working on the big project who has edmx file with lots of table. I want to update a table from DB. But when I update the edmx file, it also refresh the other tables from DB. How do I update single table?
View 4 Replieshow to deal with update buttons once you click on update..I do have some buttons like update, hold, release etc...Once I click on these the database will be updated and the immeadiate changes are not reflect until unless i hit the refresh...I know..I need to rebind everthing or need to make a fresh page_load()...But I am calling around 10 Stored procs on each postback...Is there any way to avoid these many calls to database...I am using the updatepanels..so user not aware of postback...he doesn't get any response from UI about the changes...
View 4 Replieshow to use update using ADO.NET dataadapters.
View 2 RepliesI want to update two tables using stored procedures but my data not updating to data base
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace INV_DN
{
public partial class Form1 : Form
{
SqlConnection con;
SqlDataAdapter da1;
SqlCommand cmd;
// SqlCommandBuilder cb;
DataSet ds;
public Form1()
[Code].....
I have two tables in oracle ,
i want to update two table data in a single command...
In ASP.NET I have a dropdown with some items in it, I have a button and a textbox. I am subscribed to the SelectedIndexChanged event of the dropdown where I pass the new selected index of the dropdown to a struct that converts it's index (via enum) to a string. That string is then gotten through a property in a class to put into the textbox.
[Code]....
Now the problem I have is that, when you click it (the button) the first time, the action get's updated with the current action selected in the listbox, but then when you click the button again WITHOUT changing anything in the listbox, the textbox shows the zero'th item in the textbox, (seems to reset), although it actually hasn't changed at all.
I'm guessing this might have something to do with the postback caused by the button click, which resets the state of the global or something, but I'm not sure. Why is it being reset while the dropdown box is still as I set it the first time?
How can I update the database with more than one item selected from the List Box. What I am currently doing updates only one item
objprp1.plugin_id = Convert.ToInt32(ListBox1.SelectedItem.Value);//passing the value(id) of the plugin thru the listbox property
I have a class array ofwhich I need to update one property, based on value of other property. And specially, I need to know which RowNumber in array I updated because I have to use that row furthur.
Here is my class array object. My class name is "ObjectComponent", it has two properties defined, and let's say I have 10 records in this array after I fill up data. Now, I need to update a specific property value "Quantity" to something if "SKU" = "SKU 3", and also, I NEED TO KNOW WHICH ROW NUMBER OF MY ARRAY OBJECT IS UPDTAED. For example, if in my array, this was ObjectComponent[2] element which is updated, I need to know this number 2.
[Code]....
so at present, I am looping through the array to find a particular value of "SKU" and updating it and while I am looping through, I can store row number when its found. But I want to make this code little efficient so in the above array, i am looking to update "Quantity" to 30 where "SKU"="SKU 3" must know the row number 2 of array. And value should be update in above array, I mean once I update "Quantity" for this "SKU", it should immediately reflect in my original Array object.
I need to insert/update data to 3 or more tables on a single button click.What is best method for achieving this?I am using mysql as my DB.
View 2 Replieshow can we update all rows without click on update link button,
or can we update all rows of gridview on click single "update" button instead of mutiple for everey row
I have a record in gridview contains string with special character like single quotes( ' ) etc..I've a edit button in gridview when i click on edit button of any record of Gridview then corresponding record shown to text box.
But on that time single quote looks like below ....
Before edit button click string in gridview cell, a testimonial or show consists of a person's written or spoken statement
After edit button click string in textbox, a testimonial or show consists of a person's written or spoken statement but when I click update button shows following error :
"A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder1$tb_comment="...f a person's written or sp...")"
What is the solution so that single quote shows as it original format as it looks in gridview cell when i click on edit button.
Currently I have a grid view with few rows of data & edit and update for each row but I want it to be done on a single click with w external edit & save button how can the functionality be performed.
View 1 RepliesI have a DataList containing a list of elements(ASP.Net app). To delete an item i first used tha classic javascript confirmation. As i found it ugly,i want to use a confirmation box plugin. when i click OK==>Delete the item from DB(using a webservice) But how can i update the DataList. The situation is liek: when u add a comment in Facebook. delete link==>Conf box==>Delete==>Comments List update.
View 1 RepliesIn code-behind I can do this to select something:
// Select item in first DropDownList
myCascadingDropDown_1.SelectedValue = itemValue_1+":::"+itemText_1;
// Select item in second DropDownList
myCascadingDropDown_2.SelectedValue = itemValue_2+":::"+itemText_2;
How can I do this in JavaScript?
EDIT:
I can select my desired item in the first dropdownlist. The problem is however, that new values based on that selected item (it is a CascadingDropDown, remember?) don't show in the second dropdown so I can't select anything there. I would need to somehow invoke the update method of the second dropdown manually.
We have two update panels on our webpage. Now first update panel is having button cancel. While second update panel is having a file upload control.
Now if the user uploads a file that is going to upload in about 2 mins, and in between, say after 30 seconds the user clicks the cancel button, the upload taking place in update panel 2 should stop.
How do we achieve this ?