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POUpload image to SQL Database
 

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  1. POUpload image to SQL Database
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    <p>I have been looking at solutions but don't know where I am doing it wrong. But I am doing it for the first time. </p> <p>I have a class Students</p> <pre><code>class Students { public Image photo { get; set; } public bool AddStudent(Students _student) { Settings mySettings = new Settings(); SqlCeConnection conn = new SqlCeConnection(mySettings.StudentsConnectionString); SqlCeCommand cmd = new SqlCeCommand(); cmd.CommandType = System.Data.CommandType.Text; cmd.Connection = conn; cmd.CommandText = "insert into students (firstname, lastname, dob, allergic, allergydetails, memo, address, photo) " + "Values (" + "'" + @FirstName + "'," + "'" + @LastName + "'," + "'" + @Dob + "'," + "'" + @isAllergic + "'," + "'" + @AllergyDetails + "'," + "'" + @Memo + "'," + "'" + @photo + "'," + "'" + @Address + "')"; cmd.Parameters.Add("@FirstName", _student.FirstName); cmd.Parameters.Add("@LastName", _student.LastName); cmd.Parameters.Add("@Dob", _student.Dob); cmd.Parameters.Add("@isAllergic", _student.isAllergic); cmd.Parameters.Add("@AllergyDetails", _student.AllergyDetails); cmd.Parameters.Add("@Memo", _student.Memo); cmd.Parameters.Add("@photo", _student.photo); cmd.Parameters.Add("@Address", _student.Address); try { conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); return true; } catch (Exception ex) { MessageBox.Show(ex.Message.ToString()); return false; } finally { if (conn.State == System.Data.ConnectionState.Open) conn.Close(); cmd = null; } } </code></pre> <p>Now I pass the property values from my form like this.</p> <pre><code> private void btnAdd_Click(object sender, EventArgs e) { Students myStudent = new Students(); myStudent.FirstName = txtFirstName.Text.Trim(); myStudent.LastName = txtLastName.Text.Trim(); myStudent.Dob = dtPicker1.Value; myStudent.Memo = txtMemo.Text.Trim(); myStudent.Address = txtAddress.Text.Trim(); myStudent.photo = Image.FromFile(openFileDialog1.FileName); // Insert New Record if (myStudent.AddStudent(myStudent)) MessageBox.Show("Student Added Successfully"); } </code></pre> <p>I am getting the following error</p> <blockquote> <p>No mapping exists from DbType System.Drawing.Bitmap to a known SqlCeType.</p> </blockquote> <p>But I don't know why I am not succedding. Any Suggestion would be highly appreciated.</p>
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    1. USAthar Anis
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      1. VTUpMod
    1. COyou need to convert your image to a byte[], it can then be stored in an image data type http://msdn.microsoft.com/en-us/library/ms172424.aspx
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      1. USLuke McGregor
    2. COFrom my experience, its been a while doing this... you should use a BLOB field in the DB, and stream the image to byte array, before putting it in the BLOB field.
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      1. USLouis van Tonder
    3. COYou don't understand, my question is different. I am keeping the photo in a class instance first and then uploading it to the db. In the instance, I don't have features like openfiledialog.filename etc.
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      1. USAthar Anis
 

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