小编Ahm*_*bdo的帖子

返回 null 时如何修复此错误

这是相关的代码部分：

        private void DgvIncome_MouseClick(object sender, MouseEventArgs e)
        {

            //try
            {
                txtCode.Text = dgvIncome.SelectedRows[0].Cells[1].Value.ToString();
                txtRecNo.Text = dgvIncome.SelectedRows[0].Cells[2].Value.ToString();
                txtMembershipID.Text = dgvIncome.SelectedRows[0].Cells[3].Value.ToString();
                txtGustName.Text = dgvIncome.SelectedRows[0].Cells[4].Value.ToString();
                txtGustMobile.Text = dgvIncome.SelectedRows[0].Cells[5].Value.ToString();
                txtNote.Text = dgvIncome.SelectedRows[0].Cells[6].Value.ToString();
                txtSalesNo.Text = dgvIncome.SelectedRows[0].Cells[7].Value.ToString();
                txtMainPackageNo.Text = dgvIncome.SelectedRows[0].Cells[8].Value.ToString();
                txtSubPackageNo.Text = dgvIncome.SelectedRows[0].Cells[9].Value.ToString();
                txtPackageNo.Text = dgvIncome.SelectedRows[0].Cells[10].Value.ToString();
                txtNatPrice.Text = dgvIncome.SelectedRows[0].Cells[11].Value.ToString();
                txtDiscount.Text = dgvIncome.SelectedRows[0].Cells[12].Value.ToString();
                dtpStartDate.Text = dgvIncome.SelectedRows[0].Cells[13].Value.ToString();
                dtpEndDate.Text = dgvIncome.SelectedRows[0].Cells[14].Value.ToString();
                ShowSalesName();
                ShowMainPackageName();
                ShowSubPackageName();
                ShowPackageName();
                ShowPrice();
                chbxSearch.Checked = false;
            }

错误：选择一行时，有空值，

System.NullReferenceException: 'Object reference not set to an instance of an object.'

System.Windows.Forms.DataGridViewCell.Value.get returned null.