close wpf user control in VB.net

Question

Hi Everyone
I'm stuck on this issue, please help.

I created an user control named "CreateNewCase_uc" within which  I created a button Close named "btnClose"

In my MainWindow, I created a Grid named "grid1" and a button Open named "btnCreateNewCase" with this code

Private Sub btnCreateNewCase_Click(sender As Object, e As RoutedEventArgs)
 
        Dim cnc As CreateNewCase_uc = New CreateNewCase_uc
        grid1.Children.Clear()
        grid1.Children.Add(cnc)
    End Sub

My question : which Code I need to Write for my bntClose button which is inside the user control to close or make disappeared the user control in VB.NET

Thanks in advance for your help.

Answer 1

Bind the DropDownList like normal (set DataSourceID, DataTextField, DataValueField), and <%BIND%> the SelectedValue field. AutoPostBack should be enabled. In the OnSelectedIndexChanged:

 protected void DropDownSelectedIndexChanged(object sender, EventArgs e)
{
    //http://programming.top54u.com/post/GridView-DropDownList-Update-SelectedValue-All-At-Once.aspx
    //http://www.codeproject.com/KB/webservices/db_values_dropdownlist.aspx

    DropDownList d = sender as DropDownList;
    if (d == null) return;

    //grab row that contains the drop down list
    GridViewRow row = (GridViewRow)d.NamingContainer;

    //pull data needed from the row (in this case we want the ID for the row)
    object ID = gridEntries.DataKeys[row.RowIndex].Values["tableID"];


    SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString);
    conn.Open();

    SqlCommand c = new SqlCommand("UPDATE table SET value = @v WHERE tableID = @id", conn);

    SqlParameter p = c.Parameters.Add("@id", SqlDbType.Int);
    p.Value = Convert.ToInt32(ID);

    p = c.Parameters.Add("@v", SqlDbType.Int);
    p.Value = Convert.ToInt32(d.SelectedValue);

    c.ExecuteNonQuery();

    //databind the gridview to reflect new data.
    gridEntries.DataBind();
}

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