Object reference not set to an instance of an object.

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C#

SqlCommand cmd = new SqlCommand("insert into TTBL(TRAID, CLINT, TRASD, OPBAL, CLBAL, TDATE, TTIME, CBY, AMOUT, AWORD, PMODE, GSLGR, GMLGR, GLGRD, CPRSN, VCHNO, RECNO) 
values (" + txtTRANSACTIONID.Text + ", '" + Session["client_id"].ToString() + "', '" + selectitemCD + "', " + txtOPENBAL.Text + ", " + txtCLOSEBAL.Text + ", '" + txtNormalDate.Text + "', '" + txtTime.Text + "', '" + txtCreatedBy.Text + "'," + txtAMOUNT.Text + ", '" + txtPAYINWORD.Text + "', '" + selectitemCC + "','" + ddlSub.Text + "', '" + ddlMain.Text + "', '" + txtGLDESCRIPTION.Text + "', '" + txtConsernPerson.Text + "'," + txtVOCHERNO.Text + ", " + txtRECEIPTNO.Text + " )", cn);

Posted 2-Apr-14 0:29am

Member 10718191

Updated 2-Apr-14 0:33am

Er. Puneet Goel

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Bernhard Hiller 2-Apr-14 8:24am

Get rid of string concatenation, use a parameterized query instead.
If it throws that exception also, you'll be able to see the line and thus the "missing" value.

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Er. Puneet Goel · Answer 1 · 2014-04-02T00:34:00

Solution 1

You need to add breakpoint on this like or use try catch to know which variable/control is throwing this error. Only then we can fix it.

Posted 2-Apr-14 0:34am

Er. Puneet Goel

ArunRajendra · Answer 2 · 2014-04-02T00:44:00

Solution 2

Possible candidates to throw this error Session["client_id"].ToString() , selectitemCD, selectitemCC. Check they are not null.

Posted 2-Apr-14 0:44am

ArunRajendra