我曾经尝试这样做下面的SQL语句，发现上面的错误:

Textbox1.text=abc@gmail.com;

string chksql="select reg_id from reg_details where reg_email="+Textbox1.text;

adp = new SqlDataAdapter(chksql, con);

tbl = new DataTable();

adp.Fill(tbl);

| biswarup88