Idk why the developer had taken the hdnfilepath give me a proper knowledge about it.what is the use of using hiddenfeild in source page of asp.net application.
function LoadDocument(url) {
debugger
$("#ViewDocumentmodal").modal({ backdrop: 'static', keyboard: false},"show");
var imgFull = document.getElementById("imgFull");
var hdnfilepath = document.getElementById('<%= hdnfilepath.ClientID %>');
if (url != "" && url != null && url != "0") {
imgFull.src = url;
hdnfilepath.value = imgFull.src;
imgFull.style.display = "block";
return false;
}
else {
$("#ViewDocumentmodal").modal("hide");
alert("Image is not available");
}
}
Deepak RawatPosted Jul 7, 2023, 4:59 AM
In the provided code snippet,
hdnfilepathrefers to a hidden field in an ASP.NET application's source page. A hidden field is an HTML input element with itstypeattribute set to "hidden". It allows developers to store values on the page that are not visible to the user but can be accessed and manipulated programmatically.The purpose of using a hidden field in this context seems to be to store the URL of a document or image. The
LoadDocumentfunction is called with a URL parameter. If the URL is not empty or null and is not equal to "0", the function sets the source of an image (imgFull.src) to the provided URL and assigns the same value to the hidden field (hdnfilepath.value = imgFull.src).The hidden field may be used to retain the URL value across postbacks or to pass it to server-side code for further processing. Since the hidden field retains its value between postbacks, it can be useful in scenarios where you need to store information on the client side that will be sent back to the server when a form is submitted or when performing other interactions on the page.
In this specific case, it appears that the URL of the image being loaded is stored in the hidden field, possibly for later use or retrieval by other functions or server-side code.