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digiteyes on 03/23/10

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Last Edited at 03/23/10 03:25pm

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Setting values of SharePoint Lookup field

/ Published in: JavaScript

this snippet allows you to dynamically set the value of a SharePoint lookup field based on a URL parameter

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// This javascript sets the default value of a lookup field identified

// by <<FIELD DISPLAY NAME>> to the value stored in the querysting variable

// identified by <<QUERYSTRING VARIABLE NAME>>

// Customize this javascript by replacing <<FIELD DISPLAY NAME>> and

// <<QUERYSTRING VARIABLE NAME>> with appropriate values.

// Then just paste it into NewForm.aspx inside PlaceHolderMain

_spBodyOnLoadFunctionNames.push("fillDefaultValues");

function fillDefaultValues() {

var qs = location.search.substring(1, location.search.length);

var args = qs.split("&");

var vals = new Object();

for (var i=0; i < args.length; i++) {

var nameVal = args[i].split("=");

var temp = unescape(nameVal[1]).split('+');

nameVal[1] = temp.join(' ');

vals[nameVal[0]] = nameVal[1];

}

setLookupFromFieldName("<<FIELD DISPLAY NAME>>", vals["<<QUERYSTRING VARIABLE NAME>>"]);

}

function setLookupFromFieldName(fieldName, value) {

if (value == undefined) return;

var theSelect = getTagFromIdentifierAndTitle("select","Lookup",fieldName);

// if theSelect is null, it means that the target list has more than

// 20 items, and the Lookup is being rendered with an input element

if (theSelect == null) {

var theInput = getTagFromIdentifierAndTitle("input","",fieldName);

ShowDropdown(theInput.id); //this function is provided by SharePoint

var opt=document.getElementById(theInput.opt);

setSelectedOption(opt, value);

OptLoseFocus(opt); //this function is provided by SharePoint

} else {

setSelectedOption(theSelect, value);

}

function setSelectedOption(select, value) {

var opts = select.options;

var l = opts.length;

if (select == null) return;

for (var i=0; i < l; i++) {

if (opts[i].value == value) {

select.selectedIndex = i;

return true;

}

return false;

}

function getTagFromIdentifierAndTitle(tagName, identifier, title) {

var len = identifier.length;

var tags = document.getElementsByTagName(tagName);

for (var i=0; i < tags.length; i++) {

var tempString = tags[i].id;

if (tags[i].title == title && (identifier == "" || tempString.indexOf(identifier) == tempString.length - len)) {

return tags[i];

}

return null;

}

</script>

URL: http://blogs.msdn.com/sharepointdesigner/archive/2007/06/13/using-javascript-to-manipulate-a-list-form-field.aspx

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