Display Image based on drop down selection

Question

I have a drop down with list of doctors. What I would like to do is when you select on a name from the drop down list, to display a image.

The problem I am having is to search through the image folder and compare it with the name that was selected from the drop down.

Here is what I attempted to do below which does not work:

string imgPath = "\\AccessExpress\ASPCode\OCUpgrade52\images";

if(Directory.Exists(imgPath)){

    string Name = Parameter_SelectName;//Contains the selection from drop down

    if(File.Exists(Path.Combine(imgPath, Name)) )
        Response.Write("true");
    else
        Response.Write("false");
}
else
    Response.Write("false");

Getting the following error: CS1009: Unrecognized escape sequence

And having a hard time to grab the image that matches the selection to display

Update: I was able to resolve the issue with the following (I hope this helps others who are having similar issues):

Here is what i have so far:

string imgFolderPath = @"\\AccessExpress\ASPCode\OCUpgrade52\images";

bool folderExists = System.IO.Directory.Exists(imgFolderPath);

if(folderExists){
string urlPath = "http://oc2-reatest/OCUpgrade52/images/";
string imgName= Parameter_SelectName + ".png";
string img = string.Concat(urlPath,imgName);

bool fileExists = System.IO.File.Exists(System.IO.Path.Combine(imgFolderPath, imgName));

if(fileExists)
Response.Write("<img src='" + img + "' />");

else
Response.Write("File Does Not Exists");
}

else
Response.Write("Folder Does Not Exists");

...or prefix your string with `@`. For example, `string imgPath = @"\\AccessExpress\ASPCode\OCUpgrade52\images";` — Dan Wilson, Aug 02 '18 at 22:36
Backslash is a special character in strings. https://blogs.msdn.microsoft.com/csharpfaq/2004/03/12/what-character-escape-sequences-are-available/ — Dan Wilson, Aug 02 '18 at 22:36
@IlyaBursov: Ohh, i see you changed what you entered. I was confused why you added the three slashes "///" and getting "The name 'Directory' does not exist in the current context" — user9808783, Aug 02 '18 at 22:37
Duplicate of https://stackoverflow.com/questions/1302864/unrecognized-escape-sequence-for-path-string-containing-backslashes — Iłya Bursov, Aug 02 '18 at 22:38
@IlyaBursov not really a duplicate as in my question I am asking something differently — user9808783, Aug 02 '18 at 22:46
`Parameter_SelectName` needs to contain the extension of the file, not only the file name. Make sure the value you're getting from the combo box includes it. — Josh Part, Aug 02 '18 at 23:11
@JoshPart: Could I append the extension and add it to the string Name? Also, the folder isnt being recongize at all — user9808783, Aug 02 '18 at 23:14
Yes, you can append the extension to the string Name. If the folder isn't being recognized, make sure you or the user your program runs with has access to such folder. — Josh Part, Aug 02 '18 at 23:17
\\ path means that it is not in your local drive (aka it is on network). Are you sure that your app has privillege to access that location? — kurakura88, Aug 03 '18 at 02:30

score 0 · Answer 1 · answered Aug 03 '18 at 05:33

I think just a small change to your code would do it. Once you take the doctor's name from the comboBox or drop-down, I guess you're passing it directly to find whether the file exists or not.

Try this :-

            string Name = "Parameter_SelectName";
            string path = imgPath + Name + ".jpg"; //jpg being the extention of the pictures
            bool fileExists = System.IO.File.Exists(path);

I hope that'll do the trick.

Display Image based on drop down selection

1 Answers1