官方例子:

 

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Summary It may prove beneficial to vali<a class="tags" href="/tags/DATE.html" title=date>date</a> <a class="tags" href="/tags/USER.html" title=user>user</a> <a class="tags" href="/tags/INPUT.html" title=input>input</a> within the client-side events. The BeforeExitEditModeHandler allows for a perfect time to vali<a class="tags" href="/tags/DATE.html" title=date>date</a> the the <a class="tags" href="/tags/INPUT.html" title=input>input</a> and "lock" the <a class="tags" href="/tags/USER.html" title=user>user</a> on the cell until proper data has been entered. Additional Information First, add a handler for the client-side event, BeforeExitEditModeHandler. This property can be set either in the Property Pages under displaylayout>ClientsideEvents>BeforeExitEditModeHandler or in code: UltraWebGrid1.DisplayLayout.ClientSideEvents.BeforeExitEditModeHandler = "BeforeExitEditMode" This event receives two <a class="tags" href="/tags/PARAMETERS.html" title=parameters>parameters</a>: gridname and cell id. To keep the <a class="tags" href="/tags/USER.html" title=user>user</a> within the cell, return true to cancel the event. Here is a sample that will not allow a <a class="tags" href="/tags/USER.html" title=user>user</a> to enter a <a class="tags" href="/tags/DATE.html" title=date>date</a> that is after today for a birth<a class="tags" href="/tags/DATE.html" title=date>date</a>: //create a global variable so alertbox does not appear twice. box appears twice since in the BeforeEndEditMode you are calling alert(message) which tries to end the edit as well //without this then you would find yourself in an infinite loop or have an alert appear twice. var oldvalue=<a class="tags" href="/tags/NULL.html" title=null>null</a>; <a class="tags" href="/tags/FUNCTION.html" title=function>function</a> beforeExitEditMode(gridName,cellID) { //get the cell cell=igtbl_getCellById(cellID); //get the grid grid=igtbl_getGridById(gridName); //check to see if the <a class="tags" href="/tags/USER.html" title=user>user</a> is in the birth<a class="tags" href="/tags/DATE.html" title=date>date</a> column if(cell.Column.Key=="BirthDate") { //get today's <a class="tags" href="/tags/DATE.html" title=date>date</a> var today=new Date(); //get the value of the current cell var valDate=new Date(cell.getValue()); if(valDate < today) { //if the <a class="tags" href="/tags/DATE.html" title=date>date</a> is before today then allow them to exit edit mode return 0; } //won't get here unless <a class="tags" href="/tags/DATE.html" title=date>date</a> is greater then today since a valid <a class="tags" href="/tags/DATE.html" title=date>date</a> would have exited the <a class="tags" href="/tags/FUNCTION.html" title=function>function</a> above //the next line is neccesarry so we know that this is the first time the <a class="tags" href="/tags/USER.html" title=user>user</a> is coming through the <a class="tags" href="/tags/FUNCTION.html" title=function>function</a> and //we avoid duplicate alert messages if(oldvalue==<a class="tags" href="/tags/NULL.html" title=null>null</a>) { //set oldvalue to current value so this is not hit next time through and display alert box oldvalue=valDate; alert("BirthDate can't be in the future"); } //if the <a class="tags" href="/tags/USER.html" title=user>user</a> has gotten this far then value is invlaid so return 1 to cancel the exiting of edit mode return 1; } }

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我自己写的,感觉写的不太优雅，比较丑陋，但是照着官方的写总是满足不了需求

var oldVal <a class="tags" href="/tags/FUNCTION.html" title=function>function</a> Grid_BeforeExitEditModeHandler(gridName, cellID) { //get the cell cell = igtbl_getCellById(cellID); //get the grid grid = igtbl_getGridById(gridName); if (cell.Column.Key == "operatingtimeperday") { oldVal = parseFloat(cell.getValue()); } } <a class="tags" href="/tags/FUNCTION.html" title=function>function</a> Grid_AfterExitEditModeHandler(gridName, cellID) { //get the cell cell = igtbl_getCellById(cellID); //get the grid grid = igtbl_getGridById(gridName); //check to see if the <a class="tags" href="/tags/USER.html" title=user>user</a> is in the birth<a class="tags" href="/tags/DATE.html" title=date>date</a> column if (cell.Column.Key == "operatingtimeperday") { //get the value of the current cell var val = parseFloat(cell.getValue()); if (val > 24) { alert("输入时间不可大于24小时"); cell.setValue(oldVal); return 1; } if (val < 24) { return 0; } } }