DataView not working with referenced DataSet in MDI child forms
For some reason, DataView filters within an MDI child form do not seem to
work when applied against a referenced DataSet passed from the MDI
container.
Code fragments are: (The last line is the one that does not work in a child
form)
A) wbmain.cs: (MDI Container)
private WhiteBoard.Windows.Client.WebServices.WhiteBoardDS whiteBoardDS1;
private void wbmain_Load(object sender, System.EventArgs e)
{
setCurrentForm(new frmMain(whiteBoardDS1)); // Reference to Web
Servicess accessed DataSet passed to child forms
Quote:
}
private void setCurrentForm(Form f)
{
if (f==null) return;
if (f==currForm) return;
f.TopLevel = false;
f.MdiParent = this;
pnlMain.Controls.AddRange(new System.Windows.Forms.Control[] { f });
f.Dock = DockStyle.Fill;
f.BringToFront();
f.Show();
if (currForm != null)
{
currForm.Close();
pnlMain.Controls.Remove(currForm);
}
currForm = f;
Quote:
}
private void GetWhiteBoardDS() // Fired from menu and toolbar events
{
Service1 s1 = new WhiteBoard.Windows.Client.WebServices.Service1();
try
{
this.Cursor = Cursors.WaitCursor;
whiteBoardDS1.Merge(s1.GetWhiteBoardDS());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
MessageBox.Show("Data will be loaded from local cache");
whiteBoardDS1.ReadXml("c:\\data\\whiteboard.xml");
}
finally
{
this.Cursor = Cursors.Default;
frmBase activeChild = (frmBase) currForm;
if (activeChild != null)
{
activeChild.AfterWhiteboardDSFill();
}
}
Quote:
}
B) frmBase.cs (base form for all MDI child forms)
public class frmBase : System.Windows.Forms.Form
{
protected WhiteBoard.Windows.Client.WebServices.WhiteBoardDS
whiteBoardDS1;
protected System.Data.DataView vCompany;
protected System.Data.DataView vContact;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public frmBase()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
// ADDITIONAL CODE SNIPPED FOR BREVITY
public virtual void SaveWhiteBoardDS(){}
public virtual void AfterWhiteboardDSFill(){}
Quote:
}
C) frmMain.cs (primary child form within MDI container: inherited from
frmBase)
public class frmMain : WhiteBoard.Windows.Client.frmBase
{
private void InitializeComponent()
{
//
// ugCompany (This is the grid that DataView filters are applied
//
this.ugCompany.DataSource = this.vCompany;
}
public frmMain(WhiteBoardDS ds)
{
// This call is required by the Windows Form Designer.
InitializeComponent();
// TODO: Add any initialization after the InitializeComponent call
whiteBoardDS1 = ds; // Reference to parent DataSet cached
}
private void SetCompanyTypeFilter()
{
string s1 = "Type = ''";
if (cbDeveloper.Checked && cbDesignCenter.Checked)
s1 = "Type = '1' OR Type = '2'";
else
if (cbDeveloper.Checked)
s1 = "Type = '1'";
else
if (cbDesignCenter.Checked)
s1 = "Type = '2'";
vCompany.Table = whiteBoardDS1.Tables["wbtCompany"];
vCompany.RowFilter = s1; // THIS DOES NOT WORK!!!
}
Quote:
}
