Looping through rows in a DataView

Question

The DataView object doesn\'t have a Rows property like DataTable.

How do I loop through the rows of a DataView?

Answer 1

You can iterate DefaultView as the following code by Indexer:

DataTable dt = new DataTable();
// add some rows to your table
// ...
dt.DefaultView.Sort = "OneColumnName ASC"; // For example
for (int i = 0; i < dt.Rows.Count; i++)
{
    DataRow oRow = dt.DefaultView[i].Row;
    // Do your stuff with oRow
    // ...
}

Answer 2

I prefer to do it in a more direct fashion. It does not have the Rows but is still has the array of rows.

tblCrm.DefaultView.RowFilter = "customertype = 'new'";

qtytotal = 0;
for (int i = 0; i < tblCrm.DefaultView.Count; i++)
{
    result = double.TryParse(tblCrm.DefaultView[i]["qty"].ToString(), out num);
    if (result == false) num = 0;
    qtytotal = qtytotal + num;
}

labQty.Text = qtytotal.ToString();

Answer 3

//You can convert DataView to Table. using DataView.ToTable();

foreach (DataRow drGroup in dtGroups.Rows)
{
    dtForms.DefaultView.RowFilter = "ParentFormID='" + drGroup["FormId"].ToString() + "'";

    if (dtForms.DefaultView.Count > 0)
    {
        foreach (DataRow drForm in dtForms.DefaultView.ToTable().Rows)
        {
            drNew = dtNew.NewRow();

            drNew["FormId"] = drForm["FormId"];
            drNew["FormCaption"] = drForm["FormCaption"];
            drNew["GroupName"] = drGroup["GroupName"];
            dtNew.Rows.Add(drNew);
        }
    }
}

// Or You Can Use

// 2.

dtForms.DefaultView.RowFilter = "ParentFormID='" + drGroup["FormId"].ToString() + "'";

DataTable DTFormFilter = dtForms.DefaultView.ToTable();

foreach (DataRow drFormFilter in DTFormFilter.Rows)
{ 
                            //Your logic goes here
}

Answer 4

The DataView object itself is used to loop through DataView rows.

DataView rows are represented by the DataRowView object. The DataRowView.Row property provides access to the original DataTable row.

C#

foreach (DataRowView rowView in dataView)
{
    DataRow row = rowView.Row;
    // Do something //
}

VB.NET

For Each rowView As DataRowView in dataView
    Dim row As DataRow = rowView.Row
    ' Do something '
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