Create table in database on button click

Question

I am creating an system using Asp.Net c#. I want create a table in the database on submit the details. I am taking the name of the table from dropdown selected item. I am using the following code but it is not working please help me..... 

 

string constr = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;

SqlConnection con = new SqlConnection(constr);

con.Open();

string insertData = "insert into ExamDetail (ExamName, SubjectName, Duration, StartTime, EndTime, NegativeMark, QusNo, QusMarks) values (@EName, @SubName, @DUR, @ST, @ET, @NM, @QN,@QM)";

SqlCommand com = new SqlCommand(insertData, con);

com.Parameters.AddWithValue("@EName", DropExamName.SelectedItem.Text);

com.Parameters.AddWithValue("@SubName", DropSubName.SelectedItem.Text);

com.Parameters.AddWithValue("@DUR", DropDuration.SelectedItem.Text);

com.Parameters.AddWithValue("@ST", Text_Stime.Text);

com.Parameters.AddWithValue("@ET", Text_Etime.Text);

com.Parameters.AddWithValue("@NM", RadioNegativeMarks.SelectedItem.Text);

com.Parameters.AddWithValue("@QN", Text_question_no.Text);

com.Parameters.AddWithValue("@QM", text_question_marks.Text);

string createExamTable = "BEGIN";

createExamTable += "CREATE TABLE [dbo]. ['"+ DropExamName.SelectedItem.Text +"'](";

createExamTable += "[ExamId] INT IDENTITY(1,1) NOT NULL,";

createExamTable += "[QusNo] INT NOT NULL,";

createExamTable += "[QusDetail] VARCHAR(MAX) NOT NULL";

createExamTable += "[Optn1] VARCHAR(MAX) NOT NULL";

createExamTable += "[Optn2] VARCHAR(MAX) NOT NULL";

createExamTable += "[Optn3] VARCHAR(MAX) NOT NULL";

createExamTable += "[Optn4] VARCHAR(MAX) NOT NULL";

createExamTable += "[CorrectOptn] INT NOT NULL";

createExamTable += ")";

createExamTable += " END";

SqlCommand ComCreateTable = new SqlCommand(createExamTable, con);

com.ExecuteNonQuery();

ComCreateTable.ExecuteNonQuery();

Response.Write("DONE");