create dataset with few records from a dataset in c#

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i have a dataset which has over 50 rows each having a unique id as InvoiceNumbers like Invoivce#121,Invoivce#122 etc.
Now i have a string list which has few invoice numbers{Invoivce#121,Invoivce#122,Invoivce#124,Invoivce#125}.Now i need to retrieve all the records from the dataset with invoice number which i have in my list.Help me how to do this,..thanks in advance..

i want the selected records to be saved in another dataset or in a datatable.pls help e to do this in c# for my ASP.Net application...

Posted 10-Oct-12 18:49pm

ajithk444

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CodingLover · Answer 1 · 2012-10-10T19:13:00

Solution 1

Maintain two database connection and manage them in a way such that read data from one and insert data to the other. If you have tried something, please show it here. So we can comment on it. :)

Posted 10-Oct-12 19:13pm

CodingLover

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ajithk444 11-Oct-12 1:28am

i have my data in a dataset "ds" binded to the grid.

<pre lang="c#"> public DataTable getRowsByFilter()
{
List<string> Mylist = new List<string>();
Mylist=GetInvoiceNumber();
DataTable dt = new DataTable("InvoiceNumbers");
foreach (string InvNum in Mylist)
{
foreach (DataRow SrcDr in ds.Tables[0].Rows)
{
dt.Rows.Add(ds.Tables[0].Select("InvoiceNumber='" + InvNum + "'"));
}
}
return dt;
}</pre>

this is the code i have tried.but it's not woring. any changes should i do.?! pls help..

Mohd. Mukhtar · Answer 2 · 2012-10-10T19:36:00

Hi Ajith,

Please try the below code snipet.

C#

List<invoice> lstInvoice = new List<invoice>();
foreach(string str in strLst)
{
  for(int i=0;i<ds.table[0].rows.count;i++)>
  {
     if(str.Equals(ds.Table[0].Row[i]["InvoiceNumber"].ToString()))
     {
        Invoice inv = new Invoice();
        inv.InvoiceNumber = ds.Table[0].Row[i]["InvoiceNumber"].ToString(); //typecast same as inv.InvoiceNumber 
        lstInvoice.Add(inv);
     }
  }
}

After this you can save lstInvoice into the database or wherever you want.

Hope this will help you.

</invoice></invoice>

_Amy · Answer 3 · 2012-10-10T19:44:00

Hi,
Write a simple linq query to get the values.
As I assumed your DataTable is:

1   Amit
2   Test1
3   Test2
4   Test3
5   test4

And your ID is:

C#

int[] id = new int []{ 1, 3, 5 };

So your query should be something like this:

C#

var query = (from s in dt.AsEnumerable()
                        join p in id.AsEnumerable() on s.Field<int>("ID") 
                        equals Convert.ToInt32(p)
                        select s);
DataTable FilteredData = query.Count() > 0 ? query.CopyToDataTable() : null;</int>

So, this query will give you the resultant datatable and the output will be like this:

1   Amit
3   Test2
5   test4

Hope it helped you.
---Amit

create dataset with few records from a dataset in c#

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