使用Windows实现数据绑定----------的解析

Posted 2020-12-29 bk1234

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");
}