c# - 错误地删除网格视图行数据 Windows 窗体我的代码附加？

Question

我正在尝试删除网格视图数据，因为我正在填充网格，

  public void FillCompanyInfo()
    {
        DataTable dtCompanyInfo = new DataTable();
        dtCompanyInfo = objFunctions.GetCompanyInfo();
        if(dtCompanyInfo.Rows.Count>0)
        {
            dgvCompany.DataSource = dtCompanyInfo;
        }
        if (dtCompanyInfo.Rows.Count > 0)
        {
            if (this.dgvCompany.Columns.Count == 8)
            {
                DataGridViewCheckBoxColumn checkColumn = new DataGridViewCheckBoxColumn();
                checkColumn.Name = "";
                checkColumn.HeaderText = "Select";
                checkColumn.Width = 50;
                checkColumn.ReadOnly = false;
                checkColumn.FillWeight = 10; //if the datagridview is resized (on form resize) the checkbox won't take up too much; value is relative to the other columns' fill values\\
                dgvCompany.Columns.Add(checkColumn);
            }
        }
    }

填充网格后，我单击网格行并单击删除按钮，

  private void btn_Delete_Click(object sender, EventArgs e)
        {
            foreach (DataGridViewRow r in dgvCompany.Rows)
            {
                if (Convert.ToBoolean(r.Cells[8].Value))  //cells[4] CONTAINS CHECKBOX COLUMN
                {
                    string strId = r.Cells[1].Value.ToString();  //cells[0] CONTAINS EMPIDCOLUMN
                    objFunctions.DeleteCompany(strId);
                }
            }
            FillCompanyInfo();
        }

但是它在我的网格视图中错误地删除了数据我得到了从 0 到 6 的数字和字符串字段以及第 7 位的 chk 框，而在将数据绑定到网格后我还在第 8 位附加了一列可能是由于某些原因?

在调试时我突然注意到在这个地方，

foreach (DataGridViewRow r in dgvCompany.Rows)

该网格视图以这种方式在 0 位置有 chk 框，然后在 7 个字段，然后在 8 位置有 chk 框如何更改顺序？

希望您的建议提前谢谢

Answer 1

您需要在绑定之前清除网格视图数据源。请参考此链接清除网格视图。试试这个代码

Datagridview 删除所有列

公共无效FillCompanyInfo（）{

        dataGridView1.DataSource = null;
        dataGridView1.Columns.Clear();
        dtCompanyInfo = GetCompanyInfo();
        if (dtCompanyInfo.Rows.Count > 0)
        {
            dataGridView1.DataSource = dtCompanyInfo;
            DataGridViewCheckBoxColumn checkColumn = new DataGridViewCheckBoxColumn();
            checkColumn.Name = "";
            checkColumn.HeaderText = "Select";
            checkColumn.Width = 50;
            checkColumn.ReadOnly = false;
            checkColumn.FillWeight = 10; //if the datagridview is resized (on form resize) the checkbox won't take up too much; value is relative to the other columns' fill values\\
            dataGridView1.Columns.Add(checkColumn);

        }

    }