convert vb6 code to c# is this correct

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Hi all I have a code in VB6 as follows

Dim strLedger as string

VB

Dim rs as Recordset

rs=some execute query

strLedger=IIf(IsNull(rs!Ledger), vbNullString, rs!Ledger)

I converted this to C# as follows

C#

String str=string.Empty;
DataSet ds=new DataSet();
ds=some execute query;
if(ds.Tables[0].Rows[0]["Ledger"].ToString()==string.Empty)
{
str=string.Empty;
}
else
{
str=ds.Tables[0].Rows[0]["Ledger"].ToString();
}

Is this a correct conversion or if any let me know

Posted 13-Mar-13 20:36pm

demouser743

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Shubham Choudhary 14-Mar-13 2:40am

yes its correct!!!

1 solution

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Bernhard Hiller · Answer 1 · 2013-03-13T21:37:00

Solution 1

To compare for a null value in the database, use is System.DBNull.
vbNullString corresponds to string.Empty.
I'd prefer

C#

if(ds.Tables[0].Rows[0]["Ledger"] is System.DBNull)
{
    str=string.Empty;
}
else
{
   str=ds.Tables[0].Rows[0]["Ledger"].ToString();
}

Posted 13-Mar-13 21:37pm

Bernhard Hiller