Question

DataView对象没有像Rows这样的DataTable属性。

如何遍历DataView的行？

Answer 1

DataView对象本身用于循环遍历DataView行。

DataView行由DataRowView对象表示。 DataRowView.Row属性提供对原始DataTable行的访问。

<强> C＃

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

<强> VB.NET

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

Answer 2

//您可以将DataView转换为Table。使用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);
        }
    }
}

//或者你可以使用

// 2。

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

DataTable DTFormFilter = dtForms.DefaultView.ToTable();

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

Answer 3

我更喜欢以更直接的方式来做。它没有Rows但仍然有行数组。

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 4

您可以通过DefaultView将Indexer迭代为以下代码：

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
    // ...
}

循环遍历DataView中的行

4 个答案: