Error converting data type nvarchar to numeric

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ERROR CONVERTING DATA TYPE NVARCHAR TO NUMERIC C#

UPDATE BUTTON BELOW MY CODE

What I have tried:

<pre>private void editbtn_Click(object sender, EventArgs e)
        //update coding.....
        {

            try
            {
                if (editbtn.Text == "EDIT")
                {
                    editbtn.Text = "Update";
                    addbtn.Text = "Cancle";
                }
                else if (editbtn.Text == "Update")
                {
                   if (checkBlank() == false)
                    {
                        if (con.State == ConnectionState.Open)
                        {
                            con.Close();
                        }
                        con.Open();
                        cmd = new SqlCommand("UPDATE FOLIOMST SET ACCD=@ACCD,GRCD =@GRCD,NAME_E=@NAME_E,NAME_M=@NAME_M,F_NAME=@F_NAME,NOMINEE1=@NOMINEE1,NOMINEE2=@NOMINEE2,ADD1=@ADD1,ADD2=@ADD2,ADD3=@ADD3,PIN1=@PIN1,SHARE_ALLO=@SHARE_ALLO,NO_OF_SH=@NO_OF_SH,VALUE_P_SH=@VALUE_P_SH,CERTNO_F=@CERTNO_F,SRNO=@SRNO,DIST_NO_F=@DIST_NO_F,DIST_NO_E=@DIST_NO_E,CATEGORY1=@CATEGORY1,CATEGORY2=@CATEGORY2,TOTAL_AMT=@TOTAL_AMT,ALLDT=@ALLDT,SH_ISSUED=@SH_ISSUED,TYPE_SH=@TYPE_SH,VLCD=@VLCD,BLCD=@BLCD,FNLCERTNO=@FNLCERTNO,HOLDSHNO=@HOLDSHNO,DT=@DT,PACCD=@PACCD,PIN2=@PIN2,DOB=@DOB,AGE=@AGE,AADHARNO=@AADHARNO,MOBNO=@MOBNO,PANNO=@PANNO,EMAILID=@EMAILID,BANK_ACNO=@BANK_ACNO,NOM1_REL=@NOM1_REL,NOM1_AGE=@NOM1_AGE,NOM1_ADHARNO=@NOM1_ADHARNO,NOM1_PANNO=@NOM1_PANNO,NOM2_REL=@NOM2_REL,NOM2_AGE=@NOM2_AGE,NOM2_AADHARNO=@NOM2_AADHARNO,NOM2_PANNO=@NOM2_PANNO,NOM1_MOBNO=@NOM1_MOBNO,NOM2_MOBNO=@NOM2_MOBNO,DMAT_CLIENT_ID=@DMAT_CLIENT_ID,DMAT_CLIENT_NAME=@DMAT_CLIENT_NAME WHERE FOLIO_NO = @FOLIO_NO ", con);
                        cmd.Parameters.AddWithValue("@FOLIO_NO", txtfoliono.Text);
                        cmd.Parameters.AddWithValue("@ACCD", txtaccd.Text);
                        cmd.Parameters.AddWithValue("@GRCD", txtgrcd.Text);
                        cmd.Parameters.AddWithValue("@NAME_E", txtnamee.Text);
                        cmd.Parameters.AddWithValue("@NAME_M", txtDmat_Client_Name.Text);
                        cmd.Parameters.AddWithValue("@F_NAME", txtfname.Text);
                        cmd.Parameters.AddWithValue("@JT_NAME", txtjtname.Text);
                        cmd.Parameters.AddWithValue("@NOMINEE1", txtnominee1.Text);
                        cmd.Parameters.AddWithValue("@NOMINEE2", txtnominee2.Text);
                        cmd.Parameters.AddWithValue("@ADD1", txtadd1.Text);
                        cmd.Parameters.AddWithValue("@ADD2", txtadd2.Text);
                        cmd.Parameters.AddWithValue("@ADD3", txtadd3.Text);
                        cmd.Parameters.AddWithValue("@PIN1",Convert.ToInt32(txtPin1.Text));
                        cmd.Parameters.AddWithValue("@SHARE_ALLO", txtshareallo.Text);
                        cmd.Parameters.AddWithValue("@NO_OF_SH", txtnoofsh.Text);
                        cmd.Parameters.AddWithValue("@VALUE_P_SH", txtvaluepsh.Text);
                        cmd.Parameters.AddWithValue("@CERTNO_F", txtcertnof.Text);
                        cmd.Parameters.AddWithValue("@SRNO", txtsrno.Text);
                        cmd.Parameters.AddWithValue("@DIST_NO_F", txtdistnof.Text);
                        cmd.Parameters.AddWithValue("@DIST_NO_E", txtdistnoe.Text);
                        cmd.Parameters.AddWithValue("@CATEGORY1", txtcategory1.Text);
                        cmd.Parameters.AddWithValue("@CATEGORY2", txtcategory2.Text);
                        cmd.Parameters.AddWithValue("@TOTAL_AMT", txttotalamt.Text);
                        cmd.Parameters.AddWithValue("@ALLDT", dtpAllotmentDate.Value.Date);
                        cmd.Parameters.AddWithValue("@SH_ISSUED", txtshissued.Text);
                        cmd.Parameters.AddWithValue("@TYPE_SH", txttypesh.Text);
                        cmd.Parameters.AddWithValue("@VLCD", cmbvillege.SelectedValue);
                        cmd.Parameters.AddWithValue("@BLCD", cmbblockno.SelectedValue);
                        cmd.Parameters.AddWithValue("@FNLCERTNO", txtfnlcertno.Text);
                        cmd.Parameters.AddWithValue("@HOLDSHNO", txtholdshno.Text);
                        cmd.Parameters.AddWithValue("@DT", txtDT.Text);
                        cmd.Parameters.AddWithValue("@PACCD", txtpaccd.Text);
                        cmd.Parameters.AddWithValue("@PIN2", txtPin2.Text);
                        cmd.Parameters.AddWithValue("@DOB", dtpDOB.Value.Date);
                        cmd.Parameters.AddWithValue("@AGE", txtAge.Text);
                        cmd.Parameters.AddWithValue("@AADHARNO", txtAdharNo.Text);
                        cmd.Parameters.AddWithValue("@MOBNO", txtMobileNo.Text);
                        cmd.Parameters.AddWithValue("@PANNO", txtPanNo.Text);
                        cmd.Parameters.AddWithValue("@EMAILID", txtEmailId.Text);
                        //cmd.Parameters.AddWithValue("@BNK_ID", cmbbankmst.SelectedValue);
                        //cmd.Parameters.AddWithValue("@IFSC_CODE", txtIfscCode.Text);
                        cmd.Parameters.AddWithValue("@BANK_ACNO", txtBankAcno.Text);
                        cmd.Parameters.AddWithValue("@NOM1_REL", txtNom1Rel.Text);
                        cmd.Parameters.AddWithValue("@NOM1_AGE", txtNom1Age.Text);
                        cmd.Parameters.AddWithValue("@NOM1_ADHARNO", txtNom1Adhar.Text);
                        cmd.Parameters.AddWithValue("@NOM1_PANNO", txtNom1Pan.Text);
                        cmd.Parameters.AddWithValue("@NOM2_REL", txtNom2Rel.Text);
                        cmd.Parameters.AddWithValue("@NOM2_AGE", txtNom2Age.Text);
                        cmd.Parameters.AddWithValue("@NOM2_AADHARNO", txtNom2Adhar.Text);
                        cmd.Parameters.AddWithValue("@NOM2_PANNO", txtNom2Pan.Text);
                        cmd.Parameters.AddWithValue("@NOM1_MOBNO", txtNom1_MobNo.Text);
                        cmd.Parameters.AddWithValue("@NOM2_MOBNO", txtNom2_MobNo.Text);
                        cmd.Parameters.AddWithValue("@DMAT_CLIENT_ID", txtDmat_Client_ID.Text);
                        cmd.Parameters.AddWithValue("@DMAT_CLIENT_NAME", txtDmat_Client_Name.Text);
                      
                        cmd.ExecuteNonQuery();
                        con.Close();
                        MessageBox.Show("Record Updated Successfully");
                        DisplayData();
                        editbtn.Text = "EDIT";
                        addbtn.Text = "ADD";
                    }
                    else
                    {
                        MessageBox.Show("Please Select Record to Update");
                   }
                }
                else if (editbtn.Text == "Cancle")
                {
                    ClearData();
                    addbtn.Text = "ADD";
                    editbtn.Text = "EDIT";
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

Posted 6-Apr-21 19:33pm

Padmasinh Kadam

Updated 6-Apr-21 19:53pm

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OriginalGriff · Answer 1 · 2021-04-06T19:53:00

Simple. One of your text boxes contains data that is going into a numeric column in your DB, but what the user entered is not a number.

There is no solution to that, except validation. At the top of the method, check and convert each user entered "Numeric" value to the appropriate C# datatype:

C#

int intVal;
if (!int.TryParse(integerTextBox.Text, out intVal))
   {
   ... report problem to user ...
   return;
   }

C#

double doubleVal;
if (!double.TryParse(doubleTextBox.Text, out doubleVal))
   {
   ... report problem to user ...
   return;
   }

Then pass the converted values as parameters to SQL:

C#

cmd.Parameters.AddWithValue("@INTEGERCOLUMN", intVal);
cmd.Parameters.AddWithValue("@DOUBLECOLUMN", doubleVal);