Question

我有一个在TextChanged事件上的文本框，该文本框允许用户过滤数据网格行。数据表绑定到数据源的数据网格。我还通过数据表将总计行添加到了数据网格，以求和所有行。我想动态地汇总每次过滤中的行。我该如何实现？

  private filterTextBox_TextChanged(object sender, EventArgs e)
  {
     (dgv1.DataSource as DataTable).DefaultView.RowFilter = 
     string.Format("Name LIKE '%{0}'", textBoxFilter.Text);
  }

  private string SumColumn(string rowItem)
  {
     return dataTable.AsEnumerable().Sum(x => decimal.Parse(x[rowItem].ToString(),
     System.Globalization.NumberStyles.Currency, null)).ToString("c");
  }

  private void dgv1_TotalRow()
  {
     DataRow row = dataTable.NewRow();
     row["Amount1"] = SumColumn("Amount1");
     row["Amount2"] = SumColumn("Amount2");
     row["Amount3"] = SumColumn("Amount3");
     row["Amount4"] = SumColumn("Amount4");
     dataTable.Rows.Add(row);
  }

  private void Load_DGV()
  {
     dgv1_TotalRow();
     dgv1.DataSource = dataTable;
  }

Answer 1

private double Sum(DataGridView dgv, string ColumnName)
{
    double sum = 0;

    foreach(DataGridViewRow row in dgv.Rows)
        sum += Convert.ToDouble(row.Cells[ColumnName].Value);

    return sum;
}

将此代码添加到该表单中，并在filterTextBox_TextChanged事件结束时像这样TextBoxWhereYouShowSum.Text = Sum(yourDataGridView, ColumnNameToSum).ToString();

如何总结文本框上已更改的过滤后的行？

1 个答案: