private void button2_Click(object sender, EventArgs e)
{
// try
// {
DateTime admission = Convert.ToDateTime(dtpadmission.Value);
DateTime expiry = Convert.ToDateTime(dtpexpirydate.Value);
DateTime release = Convert.ToDateTime(dtpreleasedate.Value);
DateTime amount = Convert.ToDateTime(dtpreceiptamount.Value);
DateTime warrant = Convert.ToDateTime(dtpwarrantdate.Value);
//dLayer.insertadmitcivilprison(admission.ToString(), txtpmsno.Text.ToString(), txtname.Text.ToString(), txtfname.Text.ToString(), cmbgender.SelectedItem.ToString(), txtoccupation.Text, txtvillage.Text, txtdistrict.Text, txtheight.Text, txtphesiogamy.Text, txtage.Text, cmbresidence.SelectedItem.ToString(), txtcaste.Text, txteducation.Text, txtpolicestation.Text, txtcolor.Text, txtidentification.Text, Txtwhichprison.Text, txtwhytransfered.Text, txtsrnoformerprison.Text, txtnamedetainingcreditor.Text, txtamountofclaim.Text, txtsentenceauthority.Text, txtcauseofdetention.Text, txtwarrantno.Text, warrant.ToString(), expiry.ToString(), release.ToString(), txtweightondischarge.Text, txtweightonadmission.Text, txtrealeaseauthority.Text, txtdurationimprisonment.Text, txtdailydietmonety.Text, txtamountreceived.Text, amount.ToString(), txtprivateproperty.Text, txtbalanceleft.Text, txtbalancedisposedoff.Text);
//MessageBox.Show("Data inserted Successfully");
SqlHelper.ExecuteNonQuery(dLayer.con, CommandType.Text, "insert into pcms.tbl_prisoner_detail (date_of_admission,pmsno,pname,pfname,sex,last_occupation,address,district,height,phesiogamy,age,residence,caste,education_qualification,police_station,color,identification_mark,previous_prison,transfer_reason,registration_no_pre_prison,reason_for_detention,amount_of_claim,sentencing_authority,reason_for_detention,warrant_no,date_of_warrant,expiry_date_imprisonment,date_of_release,weight_on_discharge,weight_on_admission,authority_of_discharge,imprisionment_duration,daily_diet_allowance_granted,amount_received,date_of_recieve,property_recieved,balance_left,balance_disposed_off) values('" + admission.ToString() + "','" + txtpmsno.Text + "','" + txtname.Text + "','" + txtfname.Text + "','" + cmbgender.SelectedItem.ToString() + "','" + txtoccupation.Text + "','" + txtvillage.Text + "','" + txtdistrict.Text + "','" + txtheight.Text + "','" + txtphesiogamy.Text + "','" + txtage.Text + "','" + cmbresidence.SelectedItem.ToString() + "','" + txtcaste.Text + "','" + txteducation.Text + "','" + txtpolicestation.Text + "','" + txtcolor.Text + "','" + txtidentification.Text + "','" + Txtwhichprison.Text + "','" + txtwhytransfered.Text + "','" + txtsrnoformerprison.Text + "','" + txtnamedetainingcreditor.Text + "','" + txtamountofclaim.Text + "','" + txtsentenceauthority.Text + "','" + txtcauseofdetention.Text + "','" + txtwarrantno.Text + "','" + warrant.ToString() + "','" + expiry.ToString() + "','" + release.ToString() + "','" + txtweightondischarge.Text + "','" + txtweightonadmission.Text + "','" + txtrealeaseauthority.Text + "','" + txtdurationimprisonment.Text + "','" + txtdailydietmonety.Text + "','" + txtamountreceived.Text + "','" + amount.ToString() + "','" + txtprivateproperty.Text + "','" + txtbalanceleft.Text + "','" + txtbalancedisposedoff.Text + "')");
}
数据层代码：
public void insertadmitcivilprison(string dateofadmission,string pmsno, string prisonername, string prisonerfathername, string gender, string occupation, string village, string district, string height, string phesiogamy, string age, string residence, string caste, string education, string police_station, string color, string identification_mark, string from_which_prison, string why_trasfered, string PMS_in_former_prison, string detaining_creditor, string amount_of_claim, string sentencing_authority, string cause_of_detention, string warrant_no, string warrant_date, string expiry_date_imprisonment, string release_date, string weight_on_discharge, string weight_on_admission, string authority_for_release, string duration_imprisonment, string diet_money, string amount_received, string date_receipt_amount, string private_property, string balance_left, string balance_disposedoff)
{
//CallingSystem.SqlHelper.ExecuteNonQuery(con, CommandType.Text, "insert into pcms.tbl_prisoner_detail(pmsno,pname,pfname,pms_no,finger_type,user_status,userid,bal_amount,canteen_bal_amount,reg_date) values('" + pmsno + "','" + prisonername + "','" + prisonerfathername + "','" + pms_no + "','" + finger_type + "','" + user_status + "','" + userid + "','" + bal_amount + "','" + canteen_bal_amount + "','" + reg_date + "')");
CallingSystem.SqlHelper.ExecuteNonQuery(con, CommandType.Text, "insert into pcms.tbl_prisoner_detail (date_of_admission,pmsno,pname,pfname,sex,last_occupation,address,district,height,phesiogamy,age,residence,caste,education_qualification,police_station,color,identification_mark,previous_prison,transfer_reason,registration_no_pre_prison,reason_for_detention,amount_of_claim,sentencing_authority,reason_for_detention,warrant_no,date_of_warrant,expiry_date_imprisonment,date_of_release,weight_on_discharge,weight_on_admission,authority_of_discharge,imprisionment_duration,daily_diet_allowance_granted,amount_received,date_of_recieve,property_recieved,balance_left,balance_disposed_off) values('" + dateofadmission + "','" + pmsno + "','" + prisonername + "','" + prisonerfathername + "','" + gender + "','" + occupation + "','" + village + "','" + district + "','" + height + "','" + phesiogamy + "','" + age + "','" + residence + "','" + caste + "','" + education + "','" + police_station + "','" + color + "','" + identification_mark + "','" + from_which_prison + "','" + why_trasfered + "','" + PMS_in_former_prison + "','" + detaining_creditor + "','" + amount_of_claim + "','" + sentencing_authority + "','" + cause_of_detention + "','" + warrant_no + "','" + warrant_date + "','" + expiry_date_imprisonment + "','" + release_date + "','" + weight_on_discharge + "','" + weight_on_admission + "','" + authority_for_release + "','" + duration_imprisonment + "','" + diet_money + "','" + amount_received + "','" + date_receipt_amount + "','" + private_property + "','" + balance_left + "','" + balance_disposedoff + "')");
}
答案 0 :(得分：0)
其中一个或一些.Value s null。如果条件允许，您可以查看它们。我还建议您使用参数而不是直接给sql命令赋值。您可以在此处找到一些好的提示：Null parameter checking in C#
答案 1 :(得分：0)
dtpadmission.Value ,dtpexpirydate.Value , etc..在这些语句中，如果它是dtpadmission，dtpexpirydate或任何日期为空，则无法从中读取该值。它返回对象空引用。所以更好检查这些属性是否为null，然后将其设置为语句。您可以按如下方式执行此操作。
DateTime admission = Convert.ToDateTime(dtpadmission != null ? dtpadmission.Value.ToString() : null ); // Instead of setting null value you can set the efault value here
OR
在这个dLayer.con中只检查dLayer对象是否为空。
如果你使用的amount.ToString()中的ToString（）方法（amount,etc..)为null），那么也是如此。