根据DialogResult的返回值判断是否加载数据

private void btnlocate_Click(object sender, EventArgs e)
        {
            FrmKanBan kb = new FrmKanBan();
            if (dgvsearch.SelectedRows.Count==0)
            {
                MessageBox.Show("未选择定位连番，请选择后再进行定位!", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            if (dgvsearch.SelectedRows.Count > 1)
            {
                MessageBox.Show("只能定位一行，请重新选择!", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            if (dgvsearch.SelectedRows.Count == 1)
            {
                DialogResult result= MessageBox.Show("是否确定根据表格中选择的连番信息定位？", "系统提示" ,MessageBoxButtons.YesNo);
                if(result==DialogResult.Yes)
                {
                    string ReciveTime = dgvsearch.CurrentRow.Cells["接收时间"].Value.ToString();
                    string ManyNo = dgvsearch.CurrentRow.Cells["连番"].Value.ToString();
                    string sql = @"update T_BarKanban set ConfigOK1=2, ConfigOK2=2 where Factory=" + kb.factory + " and ConfigOK1='0' and ConfigOK2='0' and Mtime<'" + ReciveTime + "' or(Mtime='" + ReciveTime + "' and Manynumber<'" + ManyNo + "' ) ";
                    DbHelperSQL.ExecuteSql(sql);
                    this.DialogResult = System.Windows.Forms.DialogResult.Yes;
                    this.Close();
                }
            }
        }

　　当点击按钮是的时候，给DialogResult赋一个yes值，用于返回后判断。

this.DialogResult = System.Windows.Forms.DialogResult.Yes;

　　如果返回值是yes，则重新加载数据

private void btnAdjust_Click(object sender, EventArgs e)
        {
            Locate loc = new Locate();
            loc.ShowDialog();
            if(loc.DialogResult==DialogResult.Yes)
            {
                FrmKanBan_Load(sender, e);
            }
            
        }