ASP下拉框聯動

id="ddlinstitute"

runat="server"
autopostback="true">
asp:dropdownlist>
id="ddlmajor"
runat="server">
asp:dropdownlist>

* 在ddlintitute下拉框屬性中新增onselectedindexchanged="ddlinstitute_selectedindexchanged"實現下拉框聯動

直接在**中新增

protected void page_load(object sender, eventargs e) 

}

protected void ddlinstitute_selectedindexchanged(object sender, eventargs e)}}

* 編寫資料庫操作類返回資料表，方便之後的查詢操作

public class operatordb

public static datatable getinstituteinfo()

public static datatable getmajorinfo()
public static datatable getmajorbyinstituteid(string instituteid)

* 開啟cs檔案，在pageload()函式中初始下拉框內容

protected void page_load(object sender, eventargs e)

}

protected void ddlinstitute_selectedindexchanged(object sender, eventargs e)

public

static
void
setinstitutedropdownlist(dropdownlist institute) 
public
static
void
setmajordropdownlist(dropdownlist major,string instituteid)

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