vb.net - ExecuteNonQuery: Connection property has not been initialized VB -


getting error here not sure why not opening connection. hoping can me.

 protected sub btn_submit_click(byval sender system.object, e system.eventargs) handles btn_submit.click     dim sqlstr string     dim con sqlconnection     dim connectionstring string = "data source=db\test;initial catalog=orders;integrated security=true"     dim cmdinsert new sqlcommand(sqlstr, con)     sqlstr = "insert customers(firstname,lastname,email,phone,address,city,state,zip) values (@firstname,@lastname,@email,@phone,@address,@city,@state,@zip)"     try         using connection new sqlconnection(connectionstring)             connection.open()             cmdinsert.parameters.add("@firstname", data.sqldbtype.nvarchar).value = firstname.text()             cmdinsert.parameters.add("@lastname", data.sqldbtype.nvarchar).value = lastname.text             cmdinsert.parameters.add("@email", data.sqldbtype.nvarchar).value = email.text             cmdinsert.parameters.add("@phone", data.sqldbtype.nchar).value = phone.text             cmdinsert.parameters.add("@address", data.sqldbtype.nvarchar).value = address.text             cmdinsert.parameters.add("@city", data.sqldbtype.nvarchar).value = city.text             cmdinsert.parameters.add("@state", data.sqldbtype.nvarchar).value = state.text             cmdinsert.parameters.add("@zip", data.sqldbtype.nchar).value = zip.text             cmdinsert.executenonquery()             connection.close()         end using     catch ex exception         msgbox(ex.message)     end try

you have wrong scope -- you're instantiating sqlcommand before instantiating , opening actual sql connection you're trying use execute command.

i believe fix code (i moved insert call using scope):

protected sub btn_submit_click(byval sender system.object, e system.eventargs) handles btn_submit.click dim sqlstr string dim connectionstring string = "data source=db\test;initial catalog=orders;integrated security=true" sqlstr = "insert customers(firstname,lastname,email,phone,address,city,state,zip) values (@firstname,@lastname,@email,@phone,@address,@city,@state,@zip)"  try     using connection new sqlconnection(connectionstring)          connection.open()          dim cmdinsert new sqlcommand(sqlstr, connection)  <----- **** moved here, changed connection          cmdinsert.parameters.add("@firstname", data.sqldbtype.nvarchar).value = firstname.text()         cmdinsert.parameters.add("@lastname", data.sqldbtype.nvarchar).value = lastname.text         cmdinsert.parameters.add("@email", data.sqldbtype.nvarchar).value = email.text         cmdinsert.parameters.add("@phone", data.sqldbtype.nchar).value = phone.text         cmdinsert.parameters.add("@address", data.sqldbtype.nvarchar).value = address.text         cmdinsert.parameters.add("@city", data.sqldbtype.nvarchar).value = city.text         cmdinsert.parameters.add("@state", data.sqldbtype.nvarchar).value = state.text         cmdinsert.parameters.add("@zip", data.sqldbtype.nchar).value = zip.text         cmdinsert.executenonquery()          connection.close()     end using catch ex exception     msgbox(ex.message) end try

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