Convert Datareader to String

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C#

SQL

convert

i need to convert the sqlDataReader to String for the comparing of database value to user entered text value
how to do?

Posted 6-Jun-12 4:38am

Abhi KA

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Comments

db7uk 6-Jun-12 10:40am

You cant convert an sqlDataReader into a string value? Do you mean you need to get a string value from the database using an sqlDataReader and compare it with a user entered value?

Abhi KA 7-Jun-12 2:55am

same thing check the value from database.

Ashish Jain(Be Jovial) 26-Apr-13 2:53am

@db7uk: I am fetching a column having some string through SqlDataReader and i want to convert it into string i mean like following dummy syntax
rd=cmd.ExecuteReader();
string abc=rd//i mean something should be here to conversion. So have you any idea to do such things.

[no name] 8-Jun-12 8:40am

please post your code.... that you want

Abhi KA 8-Jun-12 8:43am

but i converted textbox value into hashMD5 format some secure formate that not equal to get the value like
áÜ9IºY«¾VàWòˆ>

[no name] 8-Jun-12 9:02am

so you must deconvert from your hashcode to get original and then you can compare the database value.

Abhi KA 8-Jun-12 9:14am

deconvertion not done. had a problem

3 solutions

Solution 4

this will work in this case

if (dr["City"] != null)
{
objAdsProperties.City = dr["City"] as string;
}
else
{
objAdsProperties.City = "";
}

for integer value

objAdsProperties.BuiltYear = dr["BuiltYear"] as int? ?? default(int);

Posted 8-Jun-12 3:40am

er.munishyadav

Updated 8-Jun-12 3:41am

v3

Solution 2

C#

sqlconnection con = new sql connction("connection string");
sqlcommand com = new sqlcommand("select columnname from  tablename",con);
con.open();
sqldatareader dr = com.excutereader();
dr.read();

if(!dr.IsDBNull(0) && textbox1.text==dr.GetString(0))
{
    messagebox.show("anything");
}

con.close();

hope this helps

Posted 7-Jun-12 11:42am

mrx100

Updated 8-Jun-12 2:18am

v8

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Kschuler · Accepted Answer · 2012-06-06T05:05:00

Solution 1

As mentioned in the comments by db7uk, you can't convert a datareader into a string. What you CAN do is to use the datareader to pull values.

Here[^] is an article that I found on google that may help you.

Posted 6-Jun-12 5:05am

Kschuler