Language problems with TableAdapter in C#

[IT_Techno]

hi
I am try to insert data from TextBox to db using TableAdapter, when i insert Arabic language in TextBox and send it to DB it looks like this "????????" what does that means? how can i solve this problem?
When i insert English words it works fine

this is my Code :

            if (!UserNameTextBox.Text.Trim().Equals(""))
            {
                errorProvider1.Clear();

                if (!PasswordTextBox.Text.Trim().Equals(""))
                {
                    errorProvider2.Clear();

                    if (!RePasswordTextBox.Text.Trim().Equals(""))
                    {
                        errorProvider3.Clear();

                        try
                        {
                            this.selectUserTableAdapter1.Fill(landsDataSet1.SelectUser, UserNameTextBox.Text.Trim());
                            if (landsDataSet1.SelectUser.Rows.Count > 0)
                            {
                                errorProvider1.SetError(UserNameTextBox, "إسم المستخدم المدخل مستعمل من قبل الرجاء إختيار إسم أخر");
                                return;
                            }
                            else
                            {
                                if (PasswordTextBox.Text.Trim().Equals(RePasswordTextBox.Text.Trim()))
                                {
                                    this.insertUserTableAdapter1.Fill(landsDataSet1.InsertUser, UserNameTextBox.Text.Trim(), PasswordTextBox.Text.Trim());
                                    AlertLabel.ForeColor = Color.Green;
                                    AlertLabel.Text = "لقد تم إضافة مستخدم جديد ";
                                    ResetFields();
                                }
                                else
                                {
                                    errorProvider2.SetError(PasswordTextBox, "كلمة المرور والإعادة غير متساويتين الرجاء التأكد من كلمة المرور");
                                    errorProvider3.SetError(RePasswordTextBox, "كلمة المرور والإعادة غير متساويتين الرجاء التأكد من كلمة المرور");
                                }
                            }
                        }
                        catch (Exception exc)
                        {
                            throw new ArgumentException(exc.Message);
                        }
                    }
                    else
                    {
                        errorProvider3.SetError(RePasswordTextBox, "الرجاء إعادة كلمة المرور");
                    }
                }
                else
                {
                    errorProvider2.SetError(PasswordTextBox, "الرجاء إدخال كلمة المرور");
                }
            }
            else
            {
                errorProvider1.SetError(UserNameTextBox, "الرجاء إدخال إسم المستخدم");
            }

[Ketsuekiame]

Did you set your table to accept nvarchar? Arabic text is unicode which is not supported by varchar.

[Jx_Man]

In your qurey use "N" before your field value
e.g "insert into [UrduTextTable] values(N'" + txtUrduString + "')

[IT_Techno]

yes i set all my colums to accept nvarchar not varchar, i think the problem with :
this.insertUserTableAdapter1.Fill(landsDataSet1.InsertUser, UserNameTextBox.Text.Trim(), PasswordTextBox.Text.Trim());

does not accept Aerabic language by default do you think that ?? do you have an idea how to fix it ?

[IT_Techno]

It does not wokr to add N before my value

[Ketsuekiame]

If you retrieve the data back from the database does it show correctly?

[IT_Techno]

yes it retrive it back correctly

[Ketsuekiame]

Then the data is stored fine it's just that SQL Management Studio can't display it. Try changing the display font of mssms to a unicode font that can display English and Arabic and it should display fine.