selected index change problem

Question

i have two dropdown control on the page and both have selected index change event .

when selected index change event of first control fire and get completed second automatically fired . which in turn throw me errors can any on help to slove this issue ..

 

protected void ddlPayMode_SelectedIndexChanged(object sender, EventArgs e)

{

........ some code 

 

}

 // this selected index change fires automatcially 

protected void ddlbankAcc_code_SelectedIndexChanged(object sender, EventArgs e)

{

... some code  

}