code for request.query sting which is type char

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i want to select data from gridview whose reqest.query string is chat giv c# code for this

C#

string up = Request.QueryString[suupliername];
GridView1.DataSource = obj.selectmultiple("select distinct cat from data1 where supplier="+up+"")

i got error in this code is invallide colums name but i chek all colums name are right in data base so what i change in this code???

C#

where selectmultiple is a function which i make in c# class file

    public SqlDataReader selectparticular(string query)
    {
        command.Connection = connection;
        command.CommandText = query;
        connection.Open();
        SqlDataReader dr = command.ExecuteReader();
        return dr;
    }

Posted 26-Jun-12 22:22pm

Ritu khatri

Updated 26-Jun-12 22:58pm

member60

v2

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Sandeep Mewara 27-Jun-12 5:01am

Which part of Solution 1 & Solution 2 was confusing to you? http://www.codeproject.com/Questions/411246/Csharp-code-for-request-query-string

You ignore our replies, did not made the changes asked and do a repost of same question again. Not good.

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Sandeep Mewara · Answer 1 · 2012-06-26T23:05:00

i got error in this code is invallide colums name but i chek all colums name are right in data base so what i change in this code???
(Answering in your terms now, forget our suggestions[^])
Based on what you say, your query just asks for one column. So, based on error, look for 2 things:
1. You have a column named 'cat' in your table 'data1'
2. Make sure your query formed is correct and fetches data if you paste it in your SQL directly. For now, I see an issue already pointed earlier, based on names 'up' is a string and the way you pass it to SQL is an int datatype. You need to put single quotes around the value passed for supplier . Correct it to:

C#

GridView1.DataSource = obj.selectmultiple("select distinct cat from data1 where supplier='"+up+"'")

Now, don't repost again. Verify 1 & 2, share your result to move ahead.

AshishChaudha · Answer 2 · 2012-06-26T23:06:00

Solution 2

except of doing

C#

string up = Request.QueryString[suupliername];
GridView1.DataSource = obj.selectmultiple("select distinct cat from data1 where supplier="+up+"");

do like following:

C#

string up = Request.QueryString["suupliername"];
GridView1.DataSource = obj.selectmultiple("select distinct cat from data1 where supplier='"+up+"'")

Thanks
Ashish

Posted 26-Jun-12 23:06pm

AshishChaudha

Updated 26-Jun-12 23:07pm

v2

Comments

Sandeep Mewara 27-Jun-12 5:07am

How is this related to 'invalid column name error'?

AshishChaudha 27-Jun-12 5:12am

let here check the solution given. may be possible question is wrongly posted !!!!