dropdownlist选择的索引改变了吗? [英] dropdownlist selected index changed?

问题描述

在花药drpdownlist中查看下拉列表的对应值



大家好，

我正在使用一个下拉列表从DB显示EmpNO
我想要当我选择下拉值时，它应该显示对应的值
在另一个下拉列表中.但是不知道如何执行此操作.请告诉我这是什么C#代码.

view dropdownlist corrosponding value in anther drpdownlist



hi all,

i am using one dropdownlist for showing EmpNO from DB
i want when i select dropdown value it should be display corresponing value
in another dropdownlist.but don''t know how to do this.tell me what is c# code for this.

推荐答案

如果您正在讨论级联下拉列表，请检查这些
在级联下拉列表中动态选择值 [ ^ ]
如何使用另一个ddl填充下拉列表 [ ^ ]
层叠下拉菜单-国家/地区 [ ^ ]

ASP.NET级联下拉列表(CSASPNETCascadingDropDownList) [ CascadingDropDown演示 [在ASP.NET MVC中级联DropDownList [在ASP.Net中创建级联DropDownList [将CascadingDropDown与数据库一起使用 [

If you are talking about cascading dropdownlist then check these
Selecting value in cascading dropdown list dynamically[^]
How to populate a dropdown list with another ddl[^]
Cascading DropDown - Country to state[^]

ASP.NET cascading drop-down-list (CSASPNETCascadingDropDownList)[^]
CascadingDropDown Demonstration[^]
Cascading DropDownList in ASP.NET MVC[^]
Creating Cascading DropDownLists in ASP.Net[^]
Using CascadingDropDown with a Database[^]

protected void ddlemployeeno_SelectedIndexChanged(object sender, EventArgs e)
    {
        ddlemployeename.Items.Clear();
        //Fetch the records for all the employeename & employeeno  in dataset
        DataRow[] drEmployeeName = dsemployeeno.Tables[0].Select("EmployeeNo='" + ddlemployeeno.SelectedValue.ToString() + "'");
        foreach (DataRow drrow in drEmployeeName)
        {
            ddlemployeename.Items.Add(new ListItem(drrow["name_of_column"].ToString(), drrow["name_of_column"].ToString()));
        }
        ddlemployeename.Items.Insert(0,new ListItem("-Select-"));

    }

//首先，您应该获得第一个下拉列表的选定值

// Firstly u should get selected value of first dropdown

protected void ddlStateCode_SelectedIndexChanged(object sender, EventArgs e)
    {
              string  strStateCode ="";
              strStateCode = ddl1.SelectedValue;
             // now u should send this value to database and get records according to this value and bind second dropdown with record 
            DataSet dsCity= new DataSet();
            dsCity= obj.fnGetDetails("strStateCode");// Get city details according to state code
            ddlCity.DataSource = dsCity.Tables[1];
            ddlCity.DataValueField = "Code";
            ddlCity.DataTextField = "Description";

            ddlCity.DataBind();
            ddlCity.Items.Insert(0, new ListItem("---Select City---", "0"));
  
                      
     }

谢谢

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