How to toggle confirmation box from aspx.cs page
I have a search program that will search a database from a database. If the date range is more than 3 weeks, I want to warn them that it might take a while with all the data in the database. I have a confirmation box in a JavaScript function. I want to check the date range in the aspx.cs page. how can I disable the message box based on these criteria? here is a copy of my html code. I am not sure how to approach the checkpoint.
function warning() {
var answer = confirm("The date range you have selected will return a substantial amount of data and will take some time to process.\n\nAre you sure you want to continue?");
if (answer)
return true;
else
return false;
}
If the button is a submit button, add it to onclick (). A true return value will allow the page to continue submitting, while a false will stop submitting (submit).
EDIT: try it before you say it isn't. It looks complicated, but quite simple. Get the first date, get the second date, compare them. If there is less than 3 weeks difference, return true and allow the page to be submitted (submit), otherwise alert the user and reply to the response.
Function...
function warning() {
var ele;
var startDate;
var endDate;
var threeWeeksInMilliseconds = 1814400000; //1000 ms * 60 sec * 60 min * 24 hr * 21 days
//get starting value
ele = document.getElementById('txtStartDate');
if (ele == 'undefined'){
return false; //no start element
}
else {
try{
startDate = new Date(ele.value);
}
catch (e) {
return false;
}
}
//get the ending value
ele = document.getElementById('txtEndDate');
if (ele == 'undefined'){
return false; //no start element
}
else {
try{
endDate = new Date(ele.value);
}
catch (e) {
return false;
}
}
//getTime() returns milliseconds
if ((endDate.getTime() - startDate.getTime()) < threeWeeksInMilliseconds) {
return true;
}
//else present the message for confirmation.
var msg = "The date range you have selected will return a substantial " + "" +
"amount of data and will take some time to process.\n\n" +
"Are you sure you want to continue?";
var answer;
answer = confirm(msg);
if (answer) {
return true;
}
else {
return false;
}
//default return condition - nothing should get here so this indicates an error.
//Use true if you want to allow this to process.
return false;
}
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A confirmation window will appear which opens when the button is pressed
SearchButton.Attributes.Add("onclick", "javascript:return " + "confirm('" +
"The date range you have selected will return a substantial amount of data and will take some time to process.\n\nAre you sure you want to continue?')");
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