DataSource Controls :: Updating Dataset Value To Upper Or Other Method?
Jan 13, 2010
I have a dataset where I would like to upper all string fileds and when done check each field for a value. The other way i thought to do it is to do an upper of each string when I do the conditional check. I would like to know what is quicker upper of the values in the dataset or upper in the conditional statement? Knowing the dataset will contain a max of 10.000 rows and there are multiple conditional statements in the complete process.
I'm hoping someone can point me in the right direction. I will be as detailed as I can in explaining the issue;I have a dataset I have instantiated in a class file (vb.net), and fill the data succesfully. That data is then dumped into an excel file. What I need to do is to go through all the data in the dataset, and directly update the database, changing a "status" column from "pending" to "processing" based on the store number. As I am new to datasets (relatively speaking, of course), I am not quite certain how to accomplish this task. Below is the code I have so far:
[Code]....
If anyone could provide sample code to use, or could provide a quick bit of code I could just copy and paste in and test,
Is there any method by which we can retrieve random data from a dataset or rather directly from a table.
For example, I have around 30 questions in my table, I just wanted to display 20 among them and that too in a random order without the same item repeating. Can we achieve this using SP or through some Dataset manipulation?
it is apparent that "string builder" is better for building large string compared to sMyString = sMyString + "something";
what is a better way to search large in memory datasets? (like the example above - i know i could use loops, is there another way that i dont now about?)
I added a new table to my type dataset. When the code tries to execute the new row on that table I get the error message.
(if you can't see the error. "MissingMethodException was caught" "Method not found: 'MyTableDataTable MyNamespace.get_SSCase().")
I've tried the wizard and also click and drag the table from solution explorer to the xsd file. The other tables work, just this one table won't work. What should I check?
I would like to retrieve all upper rows from a starting row.
First you need do know the structure :
tb_Actions: actionId, prevActionId, nextActionId
If I have 3 actions in the table and that I pass the actionId to a query I would like to reveice all prev actions from the given action.
row a: 1,null,2 row b: 2,1,3 row c: 3,2,null
actionId 3 will return row b and row a, while actionId 2 will return only row a.
how to perform this with SQL ? I could also do a query for each element in C#, but thats maybe overkill to access each time the database if I can do it in one shot.
how do i copy required row in dataset to a new dataset. i have bind a xml into a dataset and i need to display say row 3 to 5 only so i do a for loop but i have encounter problem when trying to copy the rows to a new dataset.
do i have to write the xml to datatable and bind it to dataset and from there copy over ?
I have an ObjectDataSource that I want to perform updates using a business entity i.e. Type="Object"). Since the values for the entity are within a user control, I have stored a reference to the control in Session and in the updating event, set the new instance to the value of the entity from the user contol property (which also pulls values from the form viaother properties of the control):
Protected Sub MasterDataSource_Updating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ObjectDataSourceMethodEventArgs) Handles MasterDataSource.Updating Dim entity As New Login() Dim accountControl As AccountInfo = TryCast(Session("AccountCtrl"), AccountInfo) entity = accountControl.Entity e.InputParameters.Add("entity", entity) End Sub
My question is, how can I get the update method to pass this entity to the update method in my BLL class? It seems the Update method requires an ID or reference to the original object to use in determining whether any changes have taken place, but I don't really want to do this. In other words, I just want to use the Update event on my ObjectDataSource to pass my entity to the method ("Update") I set as a property and then let this business method handle the update of the data. Shown below, is the BLL update method I want to call:
Public Overloads Function Update(ByVal entity As Login) If entity Is Nothing Then Throw New ArgumentNullException("entity") End If MyBase.Update("UpdateLogin", entity.Username, entity.Password, entity.FirstName, entity.LastName, entity.Role, entity.Region, _ entity.Email, entity.Title, entity.TierID, entity.Street, entity.City, entity.State, entity.Zip, entity.Mobile, entity.Phone, entity.Fax) End Function
When I try to call this as it stands now, I get an error: ObjectDataSource 'MasterDataSource' could not find a non-generic method 'Update' that has parameters: ID, entity. Previously, I'd set up a long list of parameters of basic data types (string, int, boolean), but this is rather cumbersome and I was hoping to use an entity for this (FYI, I also got the same type of error when I tried this approach, but with the ID as the last parameter in the list). Perhaps what I'm doing here is atypical to how the ODS is normally used?? Has anyone done something like this successfully?
I am very new to updating the datasource using ObjectDatasource. I have a checkbox on click of update the update method triggers but though teh check box is checked, the value is updated as false.
Scenario: I am creating a custom gridview control which has a custom CheckBoxTemplateField column (deriving from TemplateField class). This template field column has custom Checkboxheadertemplate (implementing ITemplate) and CheckboxItemTemplate (also implementing ITemplate). In InstantiateIn method of both templates (header as well as Item template), I am adding a checkbox control which has Autopostback = true.
My requirement is: I want to mark all the values in the binding column of datasource if checkbox in headertemplate is checked. I dont want to mark only rows visible on grid. I WANT TO MARK ALL ROWS IN DATASOURCE. I want to do this in _CheckedChanged event of checkbox in header template.
Problem I am facing: When I check/uncheck the checkbox in header, it postbacks. so in OnCheckedChanged event, gridview's datasource is null. Secondly, in any event of gridview, I could access only those rows of datasource for which corresponding rows are visible in gridview through Gridviewrow.DataItem property. But I want to set it for all rows in datasource.
When I add a column to my database my .edmx is not updated when I use the 'UPDATE MODEL FROM DATABASE' context menu. No matter what I do the .edmx file is never reflective of the added column. I tried to close the project and reopen it, no luck. I closed the vwd 2010 and restarted it, no luck. I finally decided to delete and rebuild the .edmx file from scratch. This is when I finally had success of viewing the added colum in the .edmx display, even though the added colum showed all along in the Database Explorer? Could there possibly be a hotfix or something that I am missing either for SQL 2008 R2 or VS 2010 VWD?
Also my Movie.cs file which carries the 'partial call Movie' as outlined in the tutorial and the namespace Movies.Models, is not produceing the [Required(Errormsg:...)] against the Title field. When I look thru Movies.Designer.cs, I have identical namespace of Movies.Model and the class Partial Movie enties present. I am not at all sure why there is no recognition between the two modules resulting in a valid client validation check?
I have an asp.net application using visual studio express 2008. On one of my pages I created a dataset from one of my database tables. I am able to delete rows and add rows to the new dataset table. I then have a button and on the click event I use the commandbuilder to update the database table. The database table updates with new rows but the deleted rows are not carried out and I can not figure out why desite spending several hours on google to resolve this issue?
Here is some of my code:
Protected Sub Button_updateDatabase_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button_updateDatabase.Click Try 'I have created a session variable for my data adapter Dim commandbuilder As SqlCommandBuilder = New SqlCommandBuilder(Session("Adapter")) Session("Adapter").UpdateCommand = commandbuilder.GetUpdateCommand Session("Adapter").DeleteCommand = commandbuilder.GetDeleteCommand 'I created a session variable for my dataset 'This update command updates new rows to my database table but not deleted rows Session("Adapter").Update(Session("CalendarDataset"), "Name") Catch ex As Exception Response.Write(ex.Message) End Try End Sub
I am working on a page to let a user import an excel file into our database. I want to allow the user to manipulate certain fields before committing the information so I loaded a DataSet from the Excel file and bound that to a GridView. For some reason on rowUpdate my NewValues collection is empty. Here is my GridView:
i have two sqldatasource controls. one i use to display data in textbox's ,filter'd by a select parameter in page behind code. Once checked, i want to copy this data to the other datasource ,by selecting checkbox.Then display this data in detailsview control.
At present the two datasource controls declared , render data to the page simultaneously during pageload. I want to first check data in textbox's from first source, before second datasource is rendered to screen. note, both are filtered by a page variable. i wish to leave the textbox datasource control in situ, as other controls and code depend on it.The other detailsview datasource is my problem?
I have a Public Sub listed in a class file that I am using to store Select, Update,etc...methods for an Object Datasource. When I attempt to configure the datasource, the Class appears as a business object, but the sub within the class is not available for method selection. (It does not appear in drop down list in wizard.)
The sub exists, so where is a good place for me to start looking for a fix? I have part of the class file listed below:
In myapp, I can create two datasets: [dstServer1] and [dstServer2]. They are coming from two tables which are in two different SQL server: [Order1] (in server1) and [Order2] (in server2). These two tables have the same data structure. How to code to compare two dataset and then insert difference into another table without using linked server?
I have a problem, I need to get a date from an SQL database using a dataset.xsd.
To do that, I have created a query in the TableAdapter called GetDataByFecha:
SELECT fecha FROM T_Tickets WHERE(fecha = @fecha)
in C# I do this:
DateTime T_fecha;
T_fecha = Convert.ToDateTime(ticketsAdapter.GetDataByFecha(fechaTicket)); but, when I compile it I get this error: cannot convert a 'T_TicketsDataTable' object to 'System.IConvertible' type.
I have dataset which is called at page load event. Also every time i clicked on refresh it will call refresh function where it store updated values from database.
Now I want only updated fields row and want to store into datatable or another dataset.
I dont want to cmp each and every iteration of the dataset. I used Getchanges() of dataset but not working.
