c# - How can I trigger dropdown while viewing asp.net page -

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there 2 dropdown in asp.net page. when select first 1 (city), second 1 (district) triggered.

i have save button page.

when click save button, write selectedvalues of dropdowns in database. , when open page again, assign values dropdown's selected values.

the first 1 ok when assign dropdown.selectedvalue = "5" second 1 not triggered. how can trigger it?

thanx.

i have done same thing. suppose have drop down ddlcountry , ddlcity. need load cities selected country.

protected void page_load(object sender, eventargs e) {     if(!ispostback)     {        loadcountriesindropdown(ddlcountry);        ddlcountry.selectedvalue = "5" //for eg:        loadcitiesbycountryselected(ddlcity, ddlcountry.selectedvalue);  // selected country value set here 5        ddlcountry_selectedindexchanged(null, null);     } } protected void ddlcountry_selectedindexchanged(object sender, eventargs e) {     if(ddlcountry.selecteditem.text == "select")     {         ddlcity.items.clear();     }     else     {         loadcitiesbycountryselected(ddlcity, ddlcountry.selectedvalue);     }  }

hope wanted.


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