如果手动填充DropDownList

Question

 protected void Page_Load(object sender, EventArgs e)
    {
        
     string[] stringArray = new  string[6];
     stringArray[0] = "a";
     stringArray[1] = "b";
     stringArray[2] = "c";
     stringArray[3] = "d";
     stringArray[4] = "e";
     stringArray[5] = "f";
     for (int i = 0; i < stringArray.Length; i++) {
         this.DropDownList1.Items.Add(new ListItem(stringArray[i]));
        
     }    }这样DropDownList1.SelectedItem.ToString()也是a,b,c,d,e,f了也就是说如果让value为0,1,2,3,4,5

Answer 1

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i));

Answer 2

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i)); 
正解

Answer 3

 void listData()
    {
        List<controlData> cd = new List<controlData>();
        cd.Add(new controlData("one", "0.1"));
        cd.Add(new controlData("two", "0.2"));
        cd.Add(new controlData("three", "0.3"));
        cd.Add(new controlData("four", "0.4"));
        cd.Add(new controlData("five", "0.5"));
        cd.Add(new controlData("six", "0.6"));
        cd.Add(new controlData("seven", "0.7"));
        cd.Add(new controlData("eight", "0.8"));
        cd.Add(new controlData("nine", "0.9"));
        cd.Add(new controlData("ten", "1.0"));        tools.controlData.BindList(cd, "strid", "strname", ListBox1);
        tools.controlData.BindList(cd, "strid", "strname", ListBox2);
        tools.controlData.BindList(cd, "strid", "strname", ListBox3);
        tools.controlData.BindList(cd, "strid", "strname", ListBox4);
        tools.controlData.BindList(cd, "strid", "strname", ListBox5);
        tools.controlData.BindList(cd, "strid", "strname", ListBox6);
        tools.controlData.BindList(cd, "strid", "strname", ListBox7);
        tools.controlData.BindList(cd, "strid", "strname", ListBox8);
        tools.controlData.BindList(cd, "strid", "strname", ListBox9);
        
    }
楼主改一下

Answer 4

我在DropDownList控件里加入 AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"
为什么每选一次就都会增加列表的项目.
比如初使是6项选择一次就大于6项了

Answer 5

dropdownlist.datatextfield="绑定的字段名";

Answer 6

/// <summary>
        /// 继承基类ListControl的数据控件,如：DropDownList,ListBox,CheckBoxList,RadioButtonList,BulletedList.
        /// 参数 string text 可以为空.
        /// </summary>
        public static void BindList(object dataSource, string text, string value, ListControl lst)
        {
            lst.DataSource = dataSource;
            lst.DataTextField = text;
            lst.DataValueField = value;
            lst.DataBind();
        }

Answer 7

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i)); 

Answer 8

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i)); 

Answer 9

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i)); 
正解

Answer 10

this.DropDownList1.Items.Add(new ListItem(stringArray[i], i)); 

Answer 11

this.DropDownList1.Items.Add(new ListItem(stringArray[i],i));p.s楼主连“如何”和“如果”都分不清？

Answer 12

dropdownlist.datatextfield="绑定的字段名";
dropdownlist.dataVAluefield="编号";