DropdownList 绑定hashTable,dictionary
在DropDownList中有值域和文本域,在程序开发中经常要确切的绑定两个域。在好多情况下,我们页面显示的是文本,而在数据库存储的是这种文本标 识的整数,如此可以利用Dictionary建立对象,将数据库存储的值与页面显示的值联系起来,进行简单的转换,并且这样还可以实现值或者文本的检索功 能。灵活,很适合进行程序开发。
关键代码:
实例代码:
1 protected void Button1_Click(object sender, EventArgs e)
2 {
3 DropDownList1.DataTextField = "value";
4 DropDownList1.DataValueField = "key";
5 DropDownList1.DataSource = getTypeList();
6 DropDownList1.DataBind();
7 }
8 public Dictionary<int, string> getTypeList()
9 {
10 Dictionary<int, string> list = new Dictionary<int, string>();
11 list.Add(1, "L1用户");
12 list.Add(2, "L2用户");
13 list.Add(3, "赢富用户");
14 list.Add(4, "股指期货用户");
15 return list;
16 }
17 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
18 {
19 Response.Write(DropDownList1.SelectedValue.ToString());
20 }
关键代码:
1 DropDownList1.DataTextField = "value";
2 DropDownList1.DataValueField = "key";
3 DropDownList1.DataSource = getTypeList();
4 DropDownList1.DataBind();
2 DropDownList1.DataValueField = "key";
3 DropDownList1.DataSource = getTypeList();
4 DropDownList1.DataBind();
实例代码:
1 protected void Button1_Click(object sender, EventArgs e)
2 {
3 DropDownList1.DataTextField = "value";
4 DropDownList1.DataValueField = "key";
5 DropDownList1.DataSource = getTypeList();
6 DropDownList1.DataBind();
7 }
8 public Dictionary<int, string> getTypeList()
9 {
10 Dictionary<int, string> list = new Dictionary<int, string>();
11 list.Add(1, "L1用户");
12 list.Add(2, "L2用户");
13 list.Add(3, "赢富用户");
14 list.Add(4, "股指期货用户");
15 return list;
16 }
17 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
18 {
19 Response.Write(DropDownList1.SelectedValue.ToString());
20 }