求c#省市二级联动代码
- 提问者网友：℡她的他i☆
- 2021-04-27 15:48
- 二级知识专家网友：不羁的心
- 2021-04-27 16:45
下面的就是简单的查询
这是业务逻辑层的代码
/// <summary>
/// 获得所有省份
/// </summary>
/// <returns>返回DataSet类型</returns>
public DataSet GetProvinceInfo()
{
String SQL_SelectPro = "select * from ProvinceDict";
return SQLHelper.SqlHelper.ExecuteDataset(Config.DbConnectionStore.TheInstance.GetConnectionStringUser(), CommandType.Text, SQL_SelectPro);
}
/// <summary>
/// 根据省份id返回城市信息
/// </summary>
/// <param name="cityID">cityID</param>
/// <returns>返回DataSet类型</returns>
public DataSet GetProvinceInfoByCityID(int ProvinceID)
{
String SQL_SelectCity = "select * from CityDict where ProvinceID='" + ProvinceID + "'";
return SQLHelper.SqlHelper.ExecuteDataset(Config.DbConnectionStore.TheInstance.GetConnectionStringUser(), CommandType.Text, SQL_SelectCity);（这是DAl里面的方法）
}
这是表示层代码（用dropdownlist）
/// <summary>
/// 加载省信息
/// </summary>
private void JzProvince()
{
this.ddlprovince.DataSource = new BLL.NewInfo.TerminalOperator().GetProvinceInfo();
this.ddlprovince.DataTextField = "ProvinceName";
this.ddlprovince.DataValueField = "ProvinceID";
this.ddlprovince.DataBind();
}
/// <summary>
/// 根据省初始化市
/// </summary>
private void InitCityByProvince()
{
ddlcity.Items.Clear();
String pid = ddlprovince.SelectedValue;
DataSet ds = BLL.NewInfo.TerminalOperator.TheInstance.GetProvinceInfoByCityID(Int32.Parse(pid));
if (ds.Tables[0].Rows.Count > 0)
{
this.ddlcity.DataSource = ds;
this.ddlcity.DataTextField = "CityName";
this.ddlcity.DataValueField = "CityID";
this.ddlcity.DataBind();
}
}