DataSource Controls :: Delete The Rows Present In The DataTable From IEnumerable DataRow

Jul 22, 2010

I want to delete the rows present in the DataTable by using LINQ (with out looping)

The deleted rows will be come from a LINQ as below

IEnumerable<DataRow> MobileQuery = (from d in dtBillDetail.AsEnumerable()
where (String.Compare(d.Field<string>("Destination"), "MOBILE", StringComparison.InvariantCultureIgnoreCase) == 0) select d );

The DataRows present in the "MobileQuery" should be deleted in the DataTable "dtBillDetail"

View 1 Replies


Similar Messages:

DataSource Controls :: Convert An Ienumerable To A Datatable() VB.net?

May 24, 2010

I am having trouble converting a ienumerable to a datatabe here is the code:The problem is in the following line-

ViewState("dt") = elements.CopyToDataTable()
Dim dt As New DataTable
Private Sub DisplayAuthorLastName(ByVal strLetter As String)

[code]...

View 7 Replies

DataSource Controls :: Inserting A Blank DataRow Into A DataTable?

May 21, 2010

I have a DataTable that's populated with Data. I'm looping through it and checking to see what the contents of the first cell of the first column are. If they have the same value on the current iteration as the previous, I want to insert a blank row into my DataTable. The problem is that the new row is being added to the end of the DataTable instead of between the two rows. How can I get it not to append the row to the end. This is what I'm doing:

[Code]....

View 3 Replies

DataSource Controls :: Add Datarow() Array To An Existing Datatable?

Jun 16, 2010

I have a dataset that has around 5 rows. I also have another Datarow() array that has an additional 3 rows which I would want to add to the dataset. The structure of both the Dataset Rows and the Datarow arrays are the same.

Do I have to perform a loop on the datatrow arrays and add them one by one? or is there a better way of adding them in one go ?

View 3 Replies

DataSource Controls :: How To Select Rows From A DataTable And Create A New ViewList With The Selected Rows Only, While ...

May 31, 2010

I have one big DataTable with X rows. I want to select Y rows from it and bind them to a new ViewList. While doing it, I want to delete these rows from the DataTable (Having X - Y rows).

What is the best and fast way to do it?

I don't know if it is better to create a new DataTable to have the Y and after that bind them to a ViewList or something else?

I'm also looking for example in code how to select/delete rows from DataTable.

View 1 Replies

DataSource Controls :: Value Of Type 'System.Data.DataRow' Cannot Be Converted To 'dataRow'

Mar 28, 2010

I have taken a DataTable control and have added colums to it. Now i want to add rows to that DataTable but when i am trying to create a DataRow of DataTable, an error is generated, showing "Value of type 'System.Data.DataRow' cannot be converted to 'dataRow'".

exact coding that i have written is as follows:

[Code]....

So, where i am getting wrong?

View 2 Replies

Forms Data Controls :: How To Delete Rows From DataTable Conditionally

Apr 13, 2010

I am trying to delete row(s) from the DataTable conditionally but I cant.

Actually I have DataList with CheckBox (default value checked=false). I am bindind DataList at run time using DataView (Dataview is created fromDataTable).

I also have <asp:Button ID="btnDelete" ....> which I am using to delete checked items in the DataList (But this functionality is not working).

The user first "checked" items in the DataList and click the the button "btnDelete". Here nothing is being deleted (?) and the DataList appears with all the items"unchecked" (even those which the the "checked" by the user). protected void btnDelete_Click(object sender, EventArgs e) . In this function I am checking state of the checkbox before deleting the row in the DataTable.

On PostBack generated by the "btnDelete", DataList appears with checkboxes unchecked therefore nothing is being deleted

Here is the DataList

[Code]....

Following is the .cs file

[Code]....

View 2 Replies

C# - A Linq Question With IEnumerable<DataRow> Result

Dec 21, 2010

How can i convert following sql guery to LINQ in C# ? I dont need all columns from both tables and the result set should be IEnumerable<DataRow>

select c.level,cl.name,c.quantity
from dbo.vw_categories c
left join dbo.vw_categoriesLocalization cl on c.level = cl.level and cl.language = 'en'
where c.level like '000%' and c.level <> '000';

View 2 Replies

DataSource Controls :: How To Add New Rows To Datatable Using Loop

Feb 26, 2010

iam working with gridview in asp.net3.5,Sqlserver2008 I am retrieving data from a SP into a datatable.i need to store this table into gridview. but am getting the last row from my datatable into my gridview.

here i need to add each row to the datatable.

my grid is like this:

[Code]....

View 5 Replies

DataSource Controls :: Serialize A Datatable With 700,00 Rows?

Jun 24, 2010

I get the usual system.outofmemoryexception with the code below.

Is there a way to do this in small chunks?

public static void Serialize(DataTable dt, string filename)
{
FileStream fs = new FileStream(filename, FileMode.Create);
BinaryFormatter bf = new BinaryFormatter();
try
{
bf.Serialize(fs, dt);
fs.Close();
}
catch (Exception)
{
fs.Close();
fs.Dispose();
File.Delete(filename);
}
}

View 3 Replies

DataSource Controls :: Update Datatable Changed Rows Only?

May 24, 2010

I am using untyped database bind to gridview in an edit form. Now user makes some changes to that datatable (update, delete, insert). How do I detect which rows he changes and which rows he deleted (so I drop them from DB). I know it can be done easily via table adapters but I am supporting a previously built app using untyped datatables/datasets.

View 9 Replies

DataSource Controls :: How To Add Rows To Datatable And Use Sqldataadapter Update Method

Jan 24, 2010

I'm trying to add new rows to a data table and then use the sqldataadapter update method bu fund some problems. First, I written this code:

[Code]....

Excuse me but the most part of variable are in italian, however I think it is possible to understand how does it work. If I execute this code I obtain this error:

System.InvalidOperationException: Update requires a valid InsertCommand when passed DataRow collection with new rows.

After this I added these lines of code just above the last line:

SqlCommandBuilder cb = new SqlCommandBuilder(adapter);
adapter.InsertCommand = cb.GetInsertCommand;

and I obtained this error:

Cannot convert method group 'GetInsertCommand' to non-delegate type 'System.Data.SqlClient.SqlCommand'. Did you intend to invoke the method?

View 2 Replies

DataSource Controls :: Adding Rows And Updating Tables From Datatable

Mar 7, 2010

Maybe this could be a simple questino, but for me it's difficult to do this action: I have a table in sql server 2005 with some records stored, for example 10 records. The primary key of this table, let's call it "Employee", it's a number field with an autoincrement constraint. I want to store more data into the table by using a OdbcDataTable object and OdbcDataAdapter and adding new rows to the datatable and afeter that use the "Update" method from the OdbcDataAdapter object.

The big deal is this: let's suppose that I want a add a new record to the datatable object, using any method or code sequence that you want. if I have 10 records stored on the data base table, when I retrieve this table schema by using the OdbcDataAdapter "Fill" method, I have a copy of the data base table schema in the DataTable object, right?. if I add a new row on the datatable object, it's suppose that the primary key column of that table must AUTO-INCREMENT the value of the key, I mean if the last value that I store on the table was the number 10 on the PK field, when I add a new row on the datatable object, the PK value on the datatable object must be the number 11 if the autoincrement constraint is present into the DataTable object, but in my case, it doesn't work

So, How can I define the conditions or set the c# data objects properties to wor in that way???. In this moment the PK column on the odbcDataTable doesn't auto-increment its value when I add a new row on it.

Please helpe with this.

PD: I have another question about the DataTable object, how many records can store this object?? I have some problems with this because sometimes when I use the Fill() method to get data into the DataTable or a DataSet object there's no problem if the Fill() method retrieves about 142000 records, but when I retrieve over the 145000 records, when I inspect the DataSet or DataTable object by using the debuging mode, they have null value. Any of you can tell me why this situation ocurrs??

View 1 Replies

DataSource Controls :: Check Datatable Rows For Existing Item?

Jun 12, 2010

I have one problem with my shopping cart that I really can't figure out all by myself.I want, if a item already exist in the datatable, the quantity to be updated for that item with the new number instead of creating the same item again.I have done a foreach loop because I think that is where I should start.Notes: MyRow[3] is the column holding the quantity.Code:

[Code]....

//Bengt

View 8 Replies

DataSource Controls :: Update Only Changed Or Insert New Rows In Datatable?

Mar 4, 2010

Existing records can be updatedNew records can be insertedAll existing records can be deleted & new ones can be insertedExisting records have a primary key field
New ones are just blank inserts

All this detail is stored in a data table. On form update I only want to update existing (only modified rows) & insert new rows. I have gone about loading the changed records in a new data table

DataTable changedRecordsTable = dataTable_old.GetChanges();

How do I compare it with all the records in the old datatable and pass them to the save query ?

View 2 Replies

DataSource Controls :: How To Delete Related Data / Rows

May 5, 2010

How to delete related data.

Ex:

Tables:

1) Account: ID,UserName,Pass

2) Campaign: ID,AccountID,Date,Balance

3) CampaignSpec: ID,CampaignID,Spec,Color

Note: Account.ID = Campaign.AccountID and Campaign.ID = CampaignSpec.CampaignID

View 1 Replies

DataSource Controls :: How To Delete The Duplicate Rows From Data Table

Mar 4, 2010

How do I remove duplicate rows from a data table based upon a two column values;I want to pass in a Data Table and a column names and get the data table back with data rows where that columns value are unique.

I have a Data Table with Duplicate Rows i want to delete the duplicates rows based upon two column values if both columns values are there then Delete the row.

View 8 Replies

DataSource Controls :: Delete Multiple Rows From Database In A Table?

May 1, 2010

I've have to delete multiple rows from database in a table . Which is the best way to delete data to optimize performance of sql server as well as asp.net.

View 6 Replies

Forms Data Controls :: Datatable To Ienumerable - Not Getting Results In The Gridview

Mar 14, 2010

I have a dataset that has two datatables. In the first datatable I have EmpNo,EmpName and EmpAddress. In the second datatable I have Empno,EmpJoindate, EmpSalary. I want a result where I should show EmpName as the label and his/her details in the gridview. I populate a datalist with the first table, and have EmpNo as the datakeys. Then I populate the gridview inside the datatable which has EmpNo,EmpJoinDate and EmpAddress. My code is

[Code]....

My Design is

<asp:DataList ID="Datalist1" runat="server" DataKeyField="EmpNo">
<ItemTemplate>
<asp:GridView ID="Gridview1" runat="server">
</asp:GridView>
</ItemTemplate>
</asp:DataList>

I do not get results in the gridview, instead have errors. I tried then placing the bound field

<asp:GridView ID="Gridview1" AutoGenerateColumns="true" runat="server">
<Columns>
<asp:BoundField DataField="EmpNo" />
</Columns>

It throwed an error stating / A field or property with the name 'EmpNo' was not found on the selected data source.

View 3 Replies

ADO.NET :: How To Cast DataTable To DataRow

Jan 5, 2011

I m trying to cast DataTable.Rows to DataRow in VB but could not manage!

Here is the sample code:

[Code]....

View 2 Replies

Convert Datatable To IENumerable?

Feb 10, 2010

Dim list As List(Of DataRow) = dt.AsEnumerable().ToList()When I compile I get the error:
'AsEnumerable' is not a member of 'System.Data.DataTable'.I added Imports system.data.datatableextensions to the file..This code works when I run it on a asp.net project But when I use the same code in Website it returns the above error..Can anyone help solve this error.

View 2 Replies

Dynamically Insert Rows In An Existing DataTable (No DataSource Used)?

Jun 1, 2010

I have created a datatable with three fields namely TimeTask, TaskItem and Count (count of user) eg; {"12:30AM-01:00AM" , T1 , 3}.

dataTable.Columns.Add("Task Time", typeof(string));
dataTable.Columns.Add("Task", typeof(string));
dataTable.Columns.Add("Count", typeof(int));
dataTable.Rows.Add("12:00AM-12:15AM", "T1", 6);
dataTable.Rows.Add("12:45AM-01:00AM", "T1", 5);
dataTable.Rows.Add("01:00AM-01:15AM", "T1", 1);
dataTable.Rows.Add("01:15AM-01:30AM", "T2", 4);
dataTable.Rows.Add("01:30AM-01:45AM", "T2", 9);
GridView1.DataSource = dataTable;
GridView1.DataBind();

In this there is no task for the TimeTask "12:15AM-12:30AM" and "12:30AM-12:45AM" yet the TimeTask should be inserted as,

TimeTask TaskItem Count
12:00AM-12:15AM T1 6
12:15AM-12:30AM - -
12:30AM-12:45AM - -
12:45AM-01:00AM T1 5
01:00AM-01:15AM T1 1
01:15AM-01:30AM T2 4
01:30AM-01:45AM T2 9

How to chk for the missing rows? Is it possible to dynamically insert rows in an existing DataTable (No DataSource used) in this scenario.

View 1 Replies

C# - Simple Way To Convert Datarow Array To Datatable?

Jan 23, 2010

I want to convert an datarow array into datatable.. Wat is the simple way to do this?

View 3 Replies

ADO.NET :: WCF Entity Framework - Convert IEnumerable To Datatable?

Oct 13, 2010

We are using WCF and ADO.NET entity framework in our ASP.NET 4.0 application. we are using Entity Framework in our WCF service to execute a storedprocedure and return the results.

[WebGet]
public List<Cs_MT> GetSearchResult(string emailId, string localTitle, string colorGrouping)
{[code]....

We are calling the WCF service from our client application and get the results as IEnumerable

IEnumerable<GetSearchResult_ByEmail_Result> SearchResult = dsContext.Execute<GetSearchResult_ByEmail_Result>(new Uri(url));

I want to loop through the records and form a new table. How to loop through it and read the values?Or How to convert IEnumerable to Datatable?

View 3 Replies

Returning Single - Row Queries Using DataAdapter - DataTable And DataRow

Feb 10, 2011

I'm fairly new to ASP.NET and am working through a tutorial that demonstrates the use of DataAdapter, DataTable, and DataRow classes. The tutorial focuses on binding returned DataTables to GridView objects - I'm having trouble understanding what to do to extract one row for display. I've found I can do the following:

ProductsTableAdapter productsAdapter = new ProductsTableAdapter();
Northwind.ProductsTable productsTable = productsAdapter.GetSingleByProductID(searchID)
Northwind.ProductsRow productRow = (Northwind.ProductsRow)productsTable.Rows[0];

A ProductsTable should be able to return its own ProductRows w/o resorting to a cast, no? Can't find how to do it otherwise. I'm thinking how to go about creating a form where the user will only ever be working on one record at a time. Wouldn't it make sense for the DAL to return a ProductsRow instead of a ProductsTable?

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved