c# - How to validate a field using javascript in itemadding eventhandler in sharepoint 2010? -



c# - How to validate a field using javascript in itemadding eventhandler in sharepoint 2010? -

please help me on adding javascript function alert below.

public override void itemadding(spitemeventproperties properties) { base.itemadding(properties); spsecurity.runwithelevatedprivileges(delegate { if (properties.afterproperties["col"] != null) { splist lstitem = properties.web.lists[list]; list<splistitem> items = (from splistitem item in lstitem .items.oftype<splistitem>() convert.toint32(item[constants.projectid].tostring().split(';')[0].tostring()) == convert.toint32(_httpcontext.request.querystring["id"]) select item).tolist<splistitem>(); if (items.count() > 0) { system.nullable<int> maxriskpriority = (from in items select convert.toint32(it[constants.riskpriority])).max(); if (some conditions) { //need add together javascript function(for alert) when conditon failed } }

c#

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