Dataview copy throws errror

Deepak Gupta

I have 2 dataview and i want to add some rows of Dataview2 to Dataview1. here is my code, Dataview Dataview1 = new Dataview(); for(i=0;i<5;i++){ Dataview1.Table.Rows.Add(Dataview2.Table.Rows[i]); } But in the for loop duing the row add, it shows me some Type casting error like 'Object reference not set to an instance of an object.'. Can someone please help me out to resolve this issue? Thanks!

4 Replies

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Master Billa17y ago
Accepted answer
Hi

You can write like this way,

DataTable DataTable1 = new DataTable();

            for (i = 0; i < 5; i++)

            {

                DataTable1.ImportRow(DataView2.Table.Rows[i]);

            }

            DataView DataView1 = DataTable1.DefaultView ;

Please make sure you have data in DataView2.Table

thank you
Deepak Gupta17y ago
I have data in DataView2 but it didn't work. I tried clone method to create the DataTable and it worked.
DataTable dt = DataView2.Table.Clone();

Thanks everyone for your response!
Deepak Gupta17y ago
Thanks for the respose, But ImportRow isn't a method of Dataview. ImportRow comes with DataTable, I also tried it but itn't working. DataTable DataTable1 = new DataTable(); for(i=0;i<5;i++){ DataTable1.ImportRow(DataView2.Table.Rows[i]); } DataView DataView1 = new DataView(DataTable1); The code doesn't show any error but it shows that DataView1 is empty.
Roei Bar17y ago
well the problem is in your code,

you canot just copy a row from datatable to datatable

you need to change it to :
Dataview Dataview1 = new Dataview();
for(i=0;i<5;i++){
Dataview1.ImportRow(Dataview2.Table.Rows[i]);
}