使用自定义SortComparer时如何冻结datagridview中的第一行

问题描述

当使用自定义SortComparer时如何冻结Datagridview中的第一行？
没有SortComparer row [x] .froozen = true; 会这样做。
但是使用SortComparer它不工作

How to freeze first row in Datagridview when using a custom SortComparer?Without SortComparer row[x].froozen = true; would do it.But with a SortComparer it doesnt work

这是我的SortComparer代码：

Here is my SortComparer Code:

DataGridView dg = (DataGridView)sender;

        if (e.Column.Index == 0)
        {
            e.SortResult = System.String.Compare(e.CellValue1.ToString(), e.CellValue2.ToString());

            if (e.SortResult == 0)
            {
                e.SortResult = System.String.Compare(
                    dg.Rows[e.RowIndex1].Cells[1].Value.ToString(),
                    dg.Rows[e.RowIndex2].Cells[1].Value.ToString());
            }

            e.Handled = true;
        }
        else if (e.Column.Index == 1)
        {

            e.SortResult = System.String.Compare(e.CellValue1.ToString(), e.CellValue2.ToString());

            if (e.SortResult == 0)
            {
                e.SortResult = System.String.Compare(
                    dg.Rows[e.RowIndex1].Cells[0].Value.ToString(),
                    dg.Rows[e.RowIndex2].Cells[0].Value.ToString());
            }
            e.Handled = true;
        }

推荐答案

您可以将SortComparer检查第一行索引是否为顶行。如果是，请设置 e.SortResult = 0 或者运行您要排序的任何代码。

You could extend your SortComparer to check if the first row index is the top row or not. If it is, set the e.SortResult = 0 or else run whatever code you want to sort with.

  private void dataGridView1_SortCompare(object sender,  DataGridViewSortCompareEventArgs e)
  {
       DataGridView dg = (DataGridView)sender;
       if (e.RowIndex1 == 0) {
           e.SortResult = 0;
           e.Handled = true;
       } else {
         // rest of your comparison code
       }
  }

，或者您可以通过检查该行是否冻结来使其变得更加流行：

or you can make it more fancy by checking if the row is frozen or not:

编辑因为某些原因，默认情况下，Row的Frozen属性设置为false

EDIT the following does not work since the Frozen property of a Row gets set to false by default for some reason

  private void dataGridView1_SortCompare(object sender,  DataGridViewSortCompareEventArgs e)
  {
       DataGridView dg = (DataGridView)sender;
       if (dg.Rows[e.RowIndex1].Frozen) {
           e.SortResult = -1;
           e.Handled = true;
       } else {
         // rest of your comparison code
       }
  }

编辑 e.SortResult = 0 而不是-1作为相等的行将根据其当前的排序位置。

EDIT The e.SortResult = 0 instead of -1 as rows that are equal will be sorted based on their current position.

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