场景
  在Winform中使用DataGridView完成增加一行、删去一行、上移一行、下移一行
  完成
  增加一行
  private void TaskViewEditHelper_OnAddStep(object sender, EventArgs e)
  {
  DataGridViewRow dr = new DataGridViewRow();
  dr.CreateCells(this.dataGridView_Task_ViewEdit);
  dr.Cells[0].Value = "公众号" + this.dataGridView_Task_ViewEdit.Rows.Count;
  dr.Cells[1].Value = "林口";
  dr.Cells[2].Value = "很多编程教程与资源";
  //this.dataGridView_Task_ViewEdit.Rows.Insert(0, dr); //增加的行作为榜首行
  this.dataGridView_Task_ViewEdit.Rows.Add(dr);//增加的行作为末了一行
  }
  删去一行
  private void TaskViewEditHelper_OnRemoveStep(object sender, EventArgs e)
  {
  if (this.dataGridView_Task_ViewEdit.SelectedRows == null || this.dataGridView_Task_ViewEdit.SelectedRows.Count == 0)
  {
  XtraMessageBox.Show("请先挑选删去步,单击榜首列以选中行");
  }
  else
  {
  if (XtraMessageBox.Show("确定要删去选中步吗?") == System.Windows.Forms.DialogResult.OK)
  {
  foreach (DataGridViewRow dr in this.dataGridView_Task_ViewEdit.SelectedRows)
  {
  if (dr.IsNewRow == false)
  {
  //假设不是已提交的行,默许情况下在增加一行数据成功后,DataGridView为新建一行作为新数据的刺进位置
  this.dataGridView_Task_ViewEdit.Rows.Remove(dr);
  }
  }
  }
  }
  }
  上移一行
  private void TaskViewEditHelper_OnUpStep(object sender, EventArgs e)
  {
  if (this.dataGridView_Task_ViewEdit.SelectedRows == null || this.dataGridView_Task_ViewEdit.SelectedRows.Count == 0)
  {
  XtraMessageBox.Show("请先挑选一行,单击榜首列以选中行");
  }
  else
  {
  if (this.dataGridView_Task_ViewEdit.SelectedRows[0].Index <= 0)
  {
  XtraMessageBox.Show("此行已在顶端,不能再上移!");
  }
  else
  {
  //留心:这儿好坏绑定命据情况的上移行
  // 挑选的行号
  int selectedRowIndex = GetSelectedRowIndex(this.dataGridView_Task_ViewEdit);
  if (selectedRowIndex >= 1)
  {
  // 仿制选中的行
  DataGridViewRow newRow = dataGridView_Task_ViewEdit.Rows[selectedRowIndex];
  // 删去选中的行
  dataGridView_Task_ViewEdit.Rows.Remove(dataGridView_Task_ViewEdit.Rows[selectedRowIndex]);
  // 将仿制的行,刺进到选中的上一行位置
  dataGridView_Task_ViewEdit.Rows.Insert(selectedRowIndex - 1, newRow);
  dataGridView_Task_ViewEdit.ClearSelection();
  // 选中开始选中的行
  dataGridView_Task_ViewEdit.Rows[selectedRowIndex - 1].Selected = true;
  }
  }
  }
  }
  注:
  这儿是没绑定命据源情况下的上移一行,增加的一行时经过是上面新增的办法完成的。

  此刻dataGridView的dataSource是为空的。

  此中用到获取选中行的办法:

  private int GetSelectedRowIndex(DataGridView dgv)
  {
  if (dgv.Rows.Count == 0)
  {
  return 0;
  }
  foreach (DataGridViewRow row in dgv.Rows)
  {
  if (row.Selected)
  {
  return row.Index;
  }
  }
  return 0;
  }
  作用
  下移一行
  private void TaskViewEditHelper_OnDownStep(object sender, EventArgs e)
  {
  if (this.dataGridView_Task_ViewEdit.SelectedRows == null || this.dataGridView_Task_ViewEdit.SelectedRows.Count == 0)
  {
  XtraMessageBox.Show("请先挑选一行,单击榜首列以选中行");
  }
  else
  {
  if (this.dataGridView_Task_ViewEdit.SelectedRows[0].Index >= this.dataGridView_Task_ViewEdit.Rows.Count - 1)
  {
  XtraMessageBox.Show("此行已在底端,不能再下移!");
  }
  else
  {
  int selectedRowIndex = GetSelectedRowIndex(this.dataGridView_Task_ViewEdit);
  if (selectedRowIndex < dataGridView_Task_ViewEdit.Rows.Count - 1)
  {
  // 仿制选中的行
  DataGridViewRow newRow = dataGridView_Task_ViewEdit.Rows[selectedRowIndex];
  // 删去选中的行
  dataGridView_Task_ViewEdit.Rows.Remove(dataGridView_Task_ViewEdit.Rows[selectedRowIndex]);
  // 将仿制的行,刺进到选中的下一行位置
  dataGridView_Task_ViewEdit.Rows.Insert(selectedRowIndex + 1, newRow);
  dataGridView_Task_ViewEdit.ClearSelection();
  // 选中开始选中的行
  dataGridView_Task_ViewEdit.Rows[selectedRowIndex + 1].Selected = true;
  }
  }
  }
  }

posted on 2020-04-13 15:50  林口  阅读(672)  评论(0编辑  收藏  举报