System.InvalidCastException: Specified cast is not valid.

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I am trying to update the values with edit button. but unable to solve it.

the error is Specified cast is not valid in

C#

Var edt = (...);


protected void btnsubmit_Click1(object sender, EventArgs e)
    {
        int Clinicid = Convert.ToInt32(ViewState["ClinicID"]);
        string editPid = Request["editid"];
        var edt = (from ed in dc.dentist_addnewpatientmodifies
                   where ed.PatientID == editPid && ed.ClinicID == Clinicid
                   select ed).FirstOrDefault();
        edt.PName = txtfname.Text;
        edt.PMobileNo = txtmobile.Text;
        edt.PLandNo = txtphone.Text;
        edt.Ppincode = txtpincode.Text;
        edt.PEmailID = txtemail.Text;
    }

Posted 12-Mar-15 23:04pm

vickycode4

Updated 12-Mar-15 23:12pm

RajeeshMenoth

v3

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Comments

Solai Raja 13-Mar-15 5:14am

At Which line you are getting error?
It seems you are converting some invalid character to Int at first line

vickycode4 13-Mar-15 5:16am

Error Line:
var edt = (from ed in dc.dentist_addnewpatientmodifies
where ed.PatientID == editPid && ed.ClinicID == Clinicid
select ed).FirstOrDefault();
Error is: Specified cast is not valid in

Solai Raja 13-Mar-15 5:23am

Check the type of dentist_addnewpatientmodifies.PatientID and dentist_addnewpatientmodifies.CliniccID, both of the value type should be equal as you declare as int(Clinicid ) and string(editPid )

vickycode4 13-Mar-15 5:40am

not worked. All the datatypes are of same type string.

Solai Raja 13-Mar-15 5:43am

So ClinicID also string in you Entity right?
Make to your local variable(On button click event) editPid as string then try

vickycode4 13-Mar-15 5:48am

In my entity ClinicId is of int datatype and patientid is of string datatype.

I tried all possible ways to cast in to same datatype but not helped.

Solai Raja 13-Mar-15 5:52am

once clean the solution and rebuild it.it may help!

vickycode4 13-Mar-15 5:54am

Thanks for your suggestion.

2 solutions

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Praveen_Kumar Gupta · Answer 1 · 2015-03-12T23:14:00

Solution 1

Check the Datatype For "PatientID" and "editPid" both must be same,
Check the Datatype For "ClinicID" and "Clinicid" both must be same,
and editPid , Clinicid must be not null

C#

int Clinicid = ViewState["ClinicID"]==null?0: Convert.ToInt32(ViewState["ClinicID"]);

C#

string editPid =  string.IsNullOrEmpty(Request["editid"])?"":Request["editid"];

Posted 12-Mar-15 23:14pm

Praveen_Kumar Gupta

Comments

vickycode4 13-Mar-15 5:20am

protected void btnsubmit_Click1(object sender, EventArgs e)
{
//int Clinicid = Convert.ToInt32(ViewState["ClinicID"]);
//string editPid = Request["editid"];

int Clinicid = ViewState["ClinicID"] == null ? 0 : Convert.ToInt32(ViewState["ClinicID"]);
string editPid = string.IsNullOrEmpty(Request["editid"]) ? "" : Request["editid"];
var edt = (from ed in dc.dentist_addnewpatientmodifies
where ed.PatientID == editPid && ed.ClinicID == Clinicid
select ed).FirstOrDefault();
edt.PName = txtfname.Text;
edt.PMobileNo = txtmobile.Text;
edt.PLandNo = txtphone.Text;
edt.Ppincode = txtpincode.Text;
edt.PEmailID = txtemail.Text;
}

But Same Error has Occured

vickycode4 13-Mar-15 5:55am

Sorry not helped...!

[no name] 18-Mar-15 4:35am

check
typeof(ed.PatientID)
typeof(ed.ClinicID)

type of editPid and typeof(ed.PatientID) must be same.
type of Clinicidand typeof(ed.ClinicID) must be same.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 2 · 2015-03-13T02:06:00

Solution 2

Quote:
where ed.PatientID == editPid && ed.ClinicID == Clinicid

According to the error, these data have different types. Please check and do appropriate changes.

Posted 13-Mar-15 2:06am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)