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POPopulating TextBox based on ComBox, Insert into Database through TextBox
 

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    <p>I'm having troubles populating TextBoxes based on a ComboBox, Also insertion code won't work.</p> <p>What should happen is, By selecting a customer from ComboBox, The details gets displayed on Text Boxes, And i can also add a customer to the ComboBox through the TextBoxes, Also there is a DataGridView displaying related info from another table based on my ComboBox selection but that's not the problem now.</p> <p>Note:</p> <p>I switched to Visual Studio 2012 recently, I'm assuming that's not a problem.</p> <p>ComboBox exception:</p> <blockquote> <p>An exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll but was not handled in user code.</p> </blockquote> <p>Save button exception:</p> <blockquote> <p>Input string was not in a correct format.</p> </blockquote> <p>About the save button, The CustomerID is an Auto increment number, So i should be able to leave it's TextBox blank but it doesn't work when i do.</p> <p>Table Structure:</p> <pre><code>Customers CustomerID [int] [PK] [AutoNumber] Name [nvarchar] Phone1 [int] Phone2 [int] Address [nvarchar] Notes [ntext] </code></pre> <p>Code:</p> <pre><code>private void FillCombo() { string code = "SELECT CustomerID, Name FROM Customers"; SqlCeDataAdapter da = new SqlCeDataAdapter(code, clsMain.con); DataSet ds = new DataSet(); da.Fill(ds); cBox1.DataSource = ds.Tables[0]; cBox1.DisplayMember = "Name"; cBox1.ValueMember = "CustomerID"; } private void frmMain_Load(object sender, EventArgs e) { clsMain.con.Open(); FillCombo(); } private void cBox1_SelectedIndexChanged(object sender, EventArgs e) { string code = "SELECT * FROM Customers WHERE CustomerID='" + cBox1.Text + "'"; SqlCeDataAdapter da = new SqlCeDataAdapter(code, clsMain.con); SqlCeCommandBuilder cmd = new SqlCeCommandBuilder(da); DataSet ds = new DataSet(); da.Fill(ds); if (cBox1.SelectedIndex &gt; 0) { txt1.Text = ds.Tables[0].Rows[0]["CustomerID"].ToString(); txt2.Text = ds.Tables[0].Rows[0]["Name"].ToString(); txt3.Text = ds.Tables[0].Rows[0]["Phone1"].ToString(); txt4.Text = ds.Tables[0].Rows[0]["Phone2"].ToString(); txt5.Text = ds.Tables[0].Rows[0]["Address"].ToString(); txt6.Text = ds.Tables[0].Rows[0]["Notes"].ToString(); } } private void stripSave_Click(object sender, EventArgs e) { string code = "INSERT INTO Customers VALUES (@CustomerID, @Name, @Phone1, @Phone2, @Address, @Notes)"; SqlCeCommand cmd = new SqlCeCommand(code, clsMain.con); cmd.Parameters.AddWithValue("@CustomerID", (txt1.Text); //Tried Parse and Convert. cmd.Parameters.AddWithValue("@Name", txt2.Text); cmd.Parameters.AddWithValue("@Phone1", txt3.Text); cmd.Parameters.AddWithValue("@Phone2", txt4.Text); cmd.Parameters.AddWithValue("@Address", txt5.Text); cmd.Parameters.AddWithValue("@Notes", txt6.Text); cmd.ExecuteNonQuery(); MessageBox.Show("Data stored."); } </code></pre> <p>Sorry if it's a long code, But i thought it would be easier to spot the problems this way.</p>
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    1. USMody
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    1. COIf CustomerID is an auto increment, why are you trying to save it to the database? Kind of defeats the purpose.
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    2. COYea you absolutely right, Thanks.
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      1. USMody
 

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