Forms Data Controls :: How To Return Multiple Rows From A Query
May 18, 2010
I have the below c# method to populate an asp.net frontend control from a linq query. The only valid way I seem to be able to reference the query variable "result" is if I use the attribute "SingleOrDefault" but unfortunately this forces my query to return just the one single set of data for every unique primary key UserId value from my query, where I require the unique data attached to each different UserId value to be returned, how can I achieve this using linq? Note, I am passing the UserId value into my method from a public variable which is also below.
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Jun 11, 2010
I have an SQL database table like the following:
ID // Code // Shape
The ID is the integer identifier.
On one line the Code may be OX01 and shape Hexagon for example
Then the next line the code is still OX01 but the shape is Triangle.
What I want to do is be able to pull back data for every line that is equal to a unique Code column. in the above example OX01 Hexagon would be returned but not OX01 Triangle.
I've tried using SELECT DISTINCT but it brings back all records and doesn't filter them correctly.
I've considered having another column which could have Child/Parent data so that only the parent is returned but i'm sure there must be a better way of doing this.
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Mar 29, 2010
I am working on a small project. I ran the query below to get the maximum userid and increase it by 1 to create a new userid. However, when I run the query, it does not display the values that I enter into the database using insert statement. For example, if I open the table called login, I can see there are three records. If Irun the select statement, it only return one record which is the one that I enter manually when I first created the table. If I run the same select statement and give it a user id that I created, it returns the correct result.
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Feb 22, 2010
I am accepting query/queries from user (our support team) in a text box where user can enter only one query or multiple queries. I need to display result of all queries entered in the textbox. If it is SELECT statement then result of that statement in grid which is done. If UPDATE/INSERT/DELETE then total number of rows affected which is also done but if only one UPDATE/INSERT/DELETE statement is entered in the textbox.
If user enters 2 UPDATE statements and then a SELECT statement then how can I get number of rows affected for individual UPDATE statements just like SQL Server Qury Analyzer displays messages in its result pane.
e.g.
(6 row(s) affected) -- first UPDATE statement
(4 row(s) affected) -- second UPDATE statement
(16 row(s) affected) -- for SELECT statement (grid will also be displayed along with these messages).
I tried almost everything, SqlDataSource (returns count of first statement only), SqlCommand.ExecuteNonQuery and DataAdapter.Fill (returns count of last statement only).
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Dec 5, 2010
I have a web service method which i'd like to return multiple rows from a datatable.
I am familar with returning values from web service methods but not multiple rows from a datatable. What is the best way to go about doing this? Do I need to return an array or list<>?
My code method is setup like this.
[WebMethod]
public void UpdateBold(int count, float lat, float lng)
{
DataTable dt = new Gallery().DisplayNearestByLatLong(count, lat, lng);
// return code here
}
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Dec 23, 2015
I have a question which is insert multiple rows in a single insert? Is that possible?
For example:
INSERT INTO EMPLOYEE(NAME, AGE)
VALUES
(JAN, 18),
(JEN, 20),
(JIN, 23)
Using C#
I have code, something like I ask but there's an error.
Here's the code
string sql = "INSERT INTO EMPLOYEE(NAME, AGE) VALUES";
for(int i = 0; i < data.length; i++)
{
sql += "(@name" + i.ToString() ", @age" + i.ToString() + "),"
}
sql = sql.Remove(sql.Length - 1);
cmd = SqlCommand(sql, con);
cmd.ExecuteNonQuery;
I got an error of "Fatal error encountered during command execution."
The error goes here
{"Parameter '@name0' must be defined."}
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Jan 14, 2010
I'm using a table adapter to perform my queries. I'm sure I'm missing something really easy, but I can't figure out how to return the number of rows returned from a query to a dataset used for a GridView.Basically, I want to display a message "No records exist for your selection" by testing for ReturnedRows = 0.
Excerpt of C# code:
handoutDSTableAdapters.handoutTableAdapter handoutsAdapter =
new handoutDSTableAdapters.handoutTableAdapter();
gv_Handout.DataSource = handoutsAdapter.GetDataByDoctor(Int32.Parse(ddl_MD.SelectedValue));
gv_Handout.DataBind();
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Nov 19, 2010
I have a page in which i need to show data in the form of a grid. Each row in the grid is made up of 2 sub-rows, the first sub-row consists of a dropdown, a textbox & a textarea. Whatever is entered in these controls should be displayed in the second sub-row in the form of labels at runtime (i.e. using javascripts)
There can be multiple rows like this. The grid would have a max of 30 row, not more than that. create this which one would be better, in terms of performance & complexity, a GridView or a DataRepeater?
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Nov 23, 2010
I am adding table rows dynamically, after I return from a post back, these rows disappear.
Is there a way to preserve these rows and add them back on page load?
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Sep 6, 2010
I have a table in my Database called Creditors.
One of the columns is Paid which is type Bool.
On my aspx I have an objectdatasource and gridview. In the DAL is a method called GetCreditors which
returns all the creditors into the Gridview.
In some cases the "paid" column is ticked and in other not.
I want to run a select query that only gets the rows where PAID is not Ticked. insead
of retrieving all.
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Apr 12, 2010
here is my code:
My sql query is returning 2 rows by my repeater is only displaying 1.
[Code]....
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Mar 9, 2011
I am currently trying to create a web from that takes multiple lines and inserts them in to multiple rows in sql. So basically On the Web form It will have the following info
Store No = "28" Activity = "Bake Cake" Date = "3/3/11"
Store No = "28" Activity = "Eat Cake" Date = "3/6/11"
Store No = "28" Activity = "Sell Lemonade" Date = "2/3/11"
Store No = "28" Activity = "Bake Fudge" Date = "3/30/11"
Store No = "28" Activity = "Eat Cookies" Date = "5/3/11"
Currently I am using this script to insert values into SQL:
[Code]....
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Jun 17, 2010
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In above query I want to have top 10 rows as well as count of all rows.
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Jul 30, 2010
I am trying to have a listview which will work like a table with paging. My problem is I need to be able to add more than 1 row at a time. ie I want to click "add new row" multiple times on the same page without the page changing and without the rows I'm adding going away.
Basically I need the user to still see the already inserted rows as well as the rows they are planning to insert on the same page. This would mean the page size is temporarily larger than it should be. The new rows would be added to the end of my data source when the user goes to another page or clicks a separate save button. However the user can add as many new rows while on a page as they wish and the page would simply grow.
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Oct 7, 2010
I have a gridview on a web form and it is working, but the users find it too slow for data entry with them having to click on the edit and update buttons. I would like to allow them to edit all the rows and then when the form's overall save button is pressed then I save the changes. I found this: [URL] which does something similar, but I don't want to use the check box to indicate which row is being edited.
I've got close based on that code, but one of the controls in the column needs to control how the rest of the columns are displayed and I can't work out how to refer to the other columns and control on the current row from some code that is called by the OnTextChanged associated with a control.
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Jun 16, 2010
ihave grid in which i want to delete selected rows (checkbox selected)
i have written code as follow but on click on delete button it delete all.
[Code]....
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Oct 22, 2010
I'm having difficulty adding a repeating header row, every x rows, to a gridview. I'm able to add the header only once with the below code. For some reason it will only add it during the last iteration through the for/next statement. I tried manually adding three separate .addat statements to different rows and it only executed the last .addat statement. I couldn't find any information on why it's only working the one time and I hope someone has a fix or better solution.
Code snippet (Note the IsWhole() function verifies that the rownumber divided into a whole number):
Protected Sub Gridview1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles Gridview.DataBound
Dim grid As GridView = TryCast(sender, GridView)
If grid IsNot Nothing Then
Dim row As New GridViewRow(0, -1, DataControlRowType.Header, DataControlRowState.Normal)
Dim header As GridViewRow = POSTURE_RESULT.HeaderRow
For i As Integer = 0 To POSTURE_RESULT.Columns.Count - 1
Dim TableCell As New TableHeaderCell()
TableCell.Text = header.Cells(i).Text
row.Cells.Add(TableCell)
Next
Dim t As Table = TryCast(grid.Controls(0), Table)
If t IsNot Nothing Then
For i As Integer = 0 To Gridview1.Rows.Count - 1
If IsWhole(i / 5) Then
t.Rows.AddAt(i, row)
End If
Next
End If
End If
End Sub
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Jan 28, 2010
in dragging multiple rows using the jquery plugin used in this link.
http://www.pedrera.com/blog/index.php/aspnet-listview-drag-and-drop-reordering-using-jquery/.
I implemented the single row drag and drop and its working perfectly but I am new to jquery so finding difficult to figure out.
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Nov 6, 2010
i'm using the code below to select multiple rows in a gridview using a checkbox, how do I modify the code in a "select all" button click event to select all the rows by checking the checkboxes in all the rows? How do I also clear all the checkboxes using sa "Clear" button click event?
[code]....
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Sep 22, 2010
I have a <asp:DetailsView> based on a table that has a details table, like so:
DB1 --> TABLE1 --> Customers: ID, name, street, mail
DB1 --> TABLE2 --> SitesToCustomers: CustomerID, SiteID
Problem One: I need my details view to show / edit both values from customer table and SitesToCustomers table, How do i do that?
Problem two: The site name (oppesed to its code that is saved at SitesToCustomers) is found on another DataBase in this table:
DB2 --> TABLE1 --> Sites: ID, SiteName
How can make the data source show site names according to their id's from SitesToCustomers table?
all of the code behind is c#.
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Jun 10, 2010
I want to put an input table on a web page using ASP.NET. The input table has 3 columns: date, quantity, and price. The number of rows is variable, depending on user input. The code behind will read the data and perform the necessary calculations. The data will not go into a database. It would be nice to have some client-side or server-side validation for the data, such as required fields and range checking.
Which control(s) in Visual Studio 2008 will perform what I want to do?
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Apr 9, 2010
iam using asp.net2.0 with c#
in my gridview iam at page load event iam displaying data from view.my 1st column in the gridview is checkbox, when user selects the checkbox and iam using paging in gridview, when user selects the checkbox and selects the rows from first page or from any page, that have to be stored in database.
in my database the table contains
orderid int primary key autoincrement
productname nvarchar
price nvarchar
quantity nvarchar
total nvarchar
when user selects the rows then in database how to store multiple rows in that table field
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Jul 18, 2010
I am trying to delete multiple rows using a checkbox in a Gridview. When someone checks the checkbox and then click on button Delete that the rows is chosen will be deleting.
GUI:
[Code]....
when i click on button Delete : Error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
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Apr 9, 2010
iam using asp.net2.0 with c#
in my gridview iam at page load event iam displaying data from view.my 1st column in the gridview is checkbox, when user selects the checkbox and iam using paging in gridview, when user selects the checkbox and selects the rows from first page or from any page, that have to be stored in database.
in my database the table contains
orderid int primary key autoincrement
productname nvarchar
price nvarchar
quantity nvarchar
total nvarchar
when user selects the rows then in database how to store multiple rows in that table field
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May 13, 2010
I want to be able to select rows and save them for later display. I wish to store the data in a session object for viewing before i decide to save permanent in database.
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