Conversion failed while converting var char value active to int

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SQL-Server-2008R2

I have a drop down list with Names Active ,Assigned etc..

This i am adding in code behind i am getting a error like conversion failed.

C#

cmd.Parameters.Add("@Status", SqlDbType.NVarChar).Value = ddlState.SelectedItem.Value;

This is some part of my procedure

SQL

else if(@Status!=0  AND @GroupId = 0)
Begin
select A.GroupName , B.Brand , B.Model , B.SerialNo , B.Status, B.AddedOn from
GroupDetails as A
inner join
DeviceDetails as B
on A.GroupId = B.GroupId where SerialNo like  '%%' AND B.Status = @Status
End

error is caused due to this..

please rectify me..
suggestions??
help??

What I have tried:

Where i am going wrong, how to convert it.. please help

Posted 21-Feb-17 22:44pm

Mahesh2223

Updated 21-Feb-17 23:22pm

Graeme_Grant

v2

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Graeme_Grant 22-Feb-17 4:58am

Please share the error message in your question by clicking on the "Improve question" to the right of your name.

F-ES Sitecore 22-Feb-17 5:17am

What type is @Status? You are adding it as a varchar yet using it as an int in the SP by comparing it to 0. If @Status is "Hello World" then how can you compare that to 0?

If @Status is an int then make it so in the SP, then convert ddlState.SelectedItem to an int when you add it to the Parameters collection and change the type of the parameter too.

To preempt your next question google "c# convert string to int"

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OriginalGriff · Answer 1 · 2017-02-21T23:18:00

Why are you passing a varchar value to a parameter you are using as an integer?
Because that is what you are doing - when you do an integer comparison:

SQL

if(@Status!=0  AND @GroupId = 0)

the system attempts to convert the string in @Status to an integer value. And in this case, it fails becuase whatever you passed isn't an integer.

Either change the test to compare strings:

SQL

if(@Status != '0'  AND @GroupId = 0)

Or better, find out what is in your dropdown list and either correct the source, or check for that.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 2 · 2017-02-21T23:22:00

Solution 2

From code, you are sending a NVarchar, but using that to compare with an integer, which is completely wrong.

You have to make them sync. Use one data type at both ends.

Posted 21-Feb-17 23:22pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)