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POIn what order C# execute sqlstatement?
 

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  1. POIn what order C# execute sqlstatement?
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    <p>I have two table related by foreign and primary key constraint.The Visit_Number in Patient table must exist in the Visit table.In my code in define create two instance of my connection string such that i can use one instance to insert record:VisitNumber in Visit table first and then the other instance to insert record in the patient table,with the believe that the cord runs from top to bottom.But this was n't the case. i still get foreign key constraint errror:</p> <pre><code>Error Number:547 Error MessageThe INSERT statement conflicted with the FOREIGN KEY constraint "Patient_Vist_FK". The conflict occurred in database "TestDB", table "dbo.Visit", column 'Visit_Number'. The statement has been terminated.On line Number: 1 </code></pre> <p>meaning the code is running as i expected. Please do you have a better approach and why isn't mine working code:</p> <pre><code>protected void btn_save_Click(object sender, EventArgs e) { string connect = System.Configuration.ConfigurationManager.ConnectionStrings["db_connection"].ToString(); SqlConnection con = new SqlConnection(connect); SqlConnection con2 = new SqlConnection(connect); string visitnumber = txtVistNumber.Text.ToString(); string insert_statement = "Insert into Patient(Patient_Number,FirstName,LastName,Gender,Tribe,Date_Of_Birth,Visit_Number)" + "Values(@Patient_Number,@FirstName,@LastName,@Gender,@Tribe,@Date_Of_Birth,@Visit_Number)"; string insert_stament2 = "Insert into Visit(Visit_Number)" + "Values(@Visit_Number)"; SqlCommand cmd = new SqlCommand(insert_statement, con); SqlCommand cmd2 = new SqlCommand(insert_stament2, con2); cmd2.Parameters.AddWithValue("@Visit_Number", txtVistNumber.Text); cmd.Parameters.AddWithValue("@Patient_Number",txtpatientNum.Text); cmd.Parameters.AddWithValue("@FirstName",txtfirstName.Text); cmd.Parameters.AddWithValue("@LastName",txtlastname.Text); cmd.Parameters.AddWithValue("@Gender", drl_gender.SelectedValue); cmd.Parameters.AddWithValue("@Tribe",DropDownList1.Text); cmd.Parameters.AddWithValue("@Date_Of_Birth", val_age.Text); cmd.Parameters.AddWithValue("@Visit_Number", txtVistNumber.Text); try { using (con) { con.Open(); int count = cmd.ExecuteNonQuery(); if (count &gt; 0) { Response.Write("&lt;script language=javascript&gt;alert('Record Sucessfully Inserted!');&lt;/script&gt;"); //Success_Message.Text = "Record inserted"; txtpatientNum.Text = String.Empty; txtfirstName.Text = String.Empty; txtlastname.Text = String.Empty; txtVistNumber.Text = String.Empty; DropDownList1.Text = String.Empty; val_age.Text = String.Empty; } } } catch (SqlException ex) { { VisitError_Message.Text = "Error Number:" + ex.Number.ToString() + " Error Message" + ex.Message + "On line Number" + ": " + ex.LineNumber; } } catch (NullReferenceException nullexception) { VisitError_Message.Text = "Error Occurred, Error Type:" + nullexception.GetType().ToString() + "Error Message:" + nullexception.Message; } catch (DllNotFoundException dllexception) { VisitError_Message.Text = dllexception.GetType().ToString() + dllexception.Message; } finally { con.Close(); } } </code></pre>
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    1. USTommy
    1. USkombo
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    1. COthe rest of your code for the execute ?
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      1. USAkrem
    2. COi don't understand pls
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      1. USkombo
    3. COThe method `btn_save_Click` is missing code. Could you post the rest of the code please?
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      1. POIn what order C# execute sqlstatement?
      1. USJason Evans
 

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