zoukankan      html  css  js  c++  java
  • 实现Windows程序的数据绑定

    一.绑定下拉框数据

                     string sql = "select * from Grade";
                    SqlDataAdapter sda = new SqlDataAdapter(sql,helper.Con);
                    sda.Fill(ds,"Grade");
                    //新建一个下拉框选项
                    DataRow row = this.ds.Tables["Grade"].NewRow();
                    row[0] = -1;
                    row[1] = "请选择";
                    this.ds.Tables["Grade"].Rows.InsertAt(row,0);

                    //绑定下拉框
                    this.cbograde.DataSource=ds.Tables["Grade"];
                    this.cbograde.DisplayMember="GradeName";
                    this.cbograde.ValueMember="GradeId";



        二.绑定DataGradeView数据

                //根据年级查询GradeId
                string sql = "select * from Student where GradeId='" + this.cbograde.SelectedValue + "'";
                try
                {
                    studentsda = new SqlDataAdapter(sql, helper.Con);

                    if (ds.Tables["Student"] != null) {
                        ds.Tables["Student"].Clear();
                    }
                    studentsda.Fill(ds, "Student");
                    //绑定数据源和DataGradeView
                    this.dgvStudent.DataSource = ds.Tables["Student"];
                }
                catch (Exception x)
                {
                    MessageBox.Show(x.Message);
                }

        三.实现数据更新

                DialogResult result=MessageBox.Show("确定更改信息吗?","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Information);
                if (result == DialogResult.Yes) {
                    SqlCommandBuilder scb = new SqlCommandBuilder(studentsda);
                    studentsda.Update(ds, "Student");
                }

  • 相关阅读:
    [洛谷P1155] 双栈排序
    [洛谷P4315] 月下”毛景“树
    [洛谷P2486] [SDOI2011]染色
    [HNOI2010] 弾飞绵羊
    mysql注入总结
    cisco交换机实现端口聚合
    python为运维人员打造一个监控脚本
    复习ACCESS注入
    利用sfc文件构建网络渗透
    FTP站点设置
  • 原文地址:https://www.cnblogs.com/chx9832/p/9448434.html
Copyright © 2011-2022 走看看