Something like this??

function call_function() {
  //console.debug("Button was clicked.");
  var grid = dijit.byId("gridu");
  var store = new dojo.data.ItemFileReadStore({url:'result2.txt'});
  var model = new dojox.grid.data.DojoData(null, store, {query:{idTravaux: '*'}, clientSort:true});
  grid.setModel(model);
  grid.refresh();
}

This issue has been discussed on other threads as well, recently again at Refresh grid when underlying data on server changes. To reiterate: 1) To update a grid you actually update the underlying store. 2) ItemFileReadStore has no mechanism to update it, so you can either recreate it, or consider using a QueryReadStore. 3) A recent update to DojoData model makes certain things easier.

Thank you frankf your solution works perfect

I have a similar situation and am having difficulty sorting out the best method of achieving the goal.

I have a .JSON source that has data for NAME, DATE, TIME IN, TIME OUT, TOTAL TIME and COMMENTS.

I need one view to show the results based on a NAME match, selected from a comboBox list, and not display the NAME column., i.e., DATE TIME TIME IN TIME OUT TOTAL TIME COMMENTS

The other view, triggered by selecting a date from the datePicker, would display only the DATE selected and not show the DATE column, i.e., NAME TIME TIME IN TIME OUT TOTAL TIME COMMENTS:

function setSearchCriteria()
{
if (radioDate.checked)
{
pSearchDate = SearchDate.getDisplayedValue();
pSearchName = "-1";
pSearchLabel = SearchDate.getDisplayedValue();
}
else if (radioName.checked)
{
pSearchName = SearchName.getValue();
pSearchDate = "";
pSearchLabel = SearchName.getDisplayedValue();
}
fillDataGrid();
}

function fillDataGrid()
{
var callTimestamp = new Date();
var paramSearchDate = pSearchDate;
var paramSearchName = pSearchName;
var parameterContent ={
timestamp: callTimestamp.getTime(),
searchDate: paramSearchDate,
searchName: paramSearchName
};
document.getElementById("loadingTimeImgDiv").style.display = "inline";
dojo.xhrGet( {
url: "retrieveTimes.do",
handleAs: "json",
content: parameterContent,
load: function(response, ioArgs)
{
model = new dojox.grid.data.DojoData();
model.store = new dojo.data.ItemFileReadStore({data:response});
model.query = {namespace:'*'};
DataGrid.setModel(model);
//DataGrid.refresh();
document.getElementById("timeFilterLabel").innerHTML = ""+pSearchLabel+"";
clearAdjusunchDlg();
clearAddDlg();
document.getElementById("loadingTimeImgDiv").style.display = "none";
},

error: function(response, ioArgs)
{
document.getElementById("loadingTimeImgDiv").style.display = "none";
showErrorDlgBox("Error retrieving time es. (JSP)");
}});
}
formatNumber = function(inDatum){
return dojo.number.format(inDatum, this.constraint);
}
formatDate = function(inDatum){
return dojo.date.locale.format(new Date(inDatum), this.constraint);
}
var view1 = {
cells: [[
{name: 'Name', width: '25%', field: 'namespace'},
{name: 'Date In', width: '15%', field: 'Date', , styles: 'display:none;'},
{name: 'Time In', width: '15%', field: 'timeIn'},
{name: 'Time Out', width: '15%', field: 'timeOut'},
{name: 'Total Time', width: '15%', field: 'totalTime', formatter: formatNumber, constraint: {places: 2}},
{name: 'Remarks', width: '15%', field: 'remarks' , editor: dojox.grid.editors.Input }
]]
};
var view2 = {
cells: [[
{name: 'Name', width: '25%', field: 'namespace', styles: 'display:none;'},
{name: 'Date In', width: '15%', field: 'Date'},
{name: 'Time In', width: '15%', field: 'timeIn'},
{name: 'Time Out', width: '15%', field: 'timeOut'},
{name: 'Total Time', width: '15%', field: 'totalTime', formatter: formatNumber, constraint: {places: 2}},
{name: 'Remarks', width: '15%', field: 'remarks' , editor: dojox.grid.editors.Input }
]]
};
var layout = [ view2 ];
function toggleSearchOptions()
{
SearchDate.setDisplayedValue("");
SearchName.setValue("-1");
if (radioDate.checked)
{
SearchDate.setDisabled(false);
SearchName.setDisabled(true);
}
else if (radioName.checked)
{
SearchDate.setDisabled(true);
SearchName.setDisabled(false);
}
}

dojo.addOnLoad(function() {

SearchDate.setValue(new Date());
pSearchDate = SearchDate.getDisplayedValue();
pSearchName = "-1"
pSearchLabel = SearchDate.getDisplayedValue();

DataGrid.setStructure(layout);

dojo.connect(DataGrid,'','');
fillDataGrid();

});

My grid refresh works on FF, but not on IE6/7. Has anyone encountered this and solved it? The console messages would display up to the end, and no errors would be reported, but the grid still doesn't refresh. But in FF, it does.

function refreshViewCategory() {
// Build URL to make XHR call to server
var url = "/" + dojo.byId("WebDBName").value + "/(dojoAgentFormCategoryJSON)?OpenAgent";
console.log(url );
var Store = new dojo.data.ItemFileReadStore({url: url});
console.log("Store" );
var Model = new dojox.grid.data.DojoData(null, Store, {query:{ Category:"*" }, clientSort:true});
console.log("Model" );
//Model.store.fetch();
//console.log("fetch" );
var grid = dijit.byId("grid");
console.log("grid" );
grid.setModel(Model);
console.log("setModel" );
grid.refresh();
console.log("refresh" );
//grid.update();
//console.log("update" );
}