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8.9

Datagrid Disappears

Asked by P1ST0LPETE in Programming for ASP.NET, WebApplications, Microsoft Programming

Tags: ASP.Net : C#

Using ASP.NET : C#  -  using .NET Framework 1.1

Not sure what I've done wrong.  When my page loads, the datagrid shows just fine.  However, when I click the "edit" button, the datagrid disappears after postback.  Attached is my code.  Any Ideas? 
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SCRIPT:
 
<script runat="server">
OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Inetpub\\wwwroot\\InsightDatabase\\App_Data\\InsightDatabase.mdb");
 
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        string editFirstName = Session["FirstName"].ToString();
        string editLastName = Session["LastName"].ToString();
        string editCompany = Session["Company"].ToString();
        string editTeam = Session["Team"].ToString();
        string editSubteam = Session["Subteam"].ToString();
        string editDate = Session["Date"].ToString();
	
    /* Following 6 variables used to hold SQL fragments */
    string firstSearch;
    string lastSearch;
    string companySearch;
    string teamSearch;
    string subteamSearch;
    string dateSearch;
	
    if (editFirstName != "")
    {
    	firstSearch = "AND firstName LIKE '" + editFirstName + "%'";
    }
    else
   	{
	    firstSearch = "";
	}
	
	if (editLastName != "")
	{
	    lastSearch = "AND lastName LIKE '" + editLastName + "%'";
	}
	else
	{
	    lastSearch = "";
	}
	
	if (editCompany != "")
	{
	    companySearch = "AND company LIKE '" + editCompany + "%'";
	}
	else
	{
	    companySearch = "";
	}
	if (editTeam != "")
	{
	    teamSearch = "AND team LIKE '" + editTeam + "%'";
	}
	else
	{
	    teamSearch = "";
	}
	if (editSubteam != "")
	{
	    subteamSearch = "AND subteam LIKE '" + editSubteam + "%'";
	}
	else
	{
	    subteamSearch = "";
	}
	if (editDate != "")
	{
		DateTime date_Convert = new DateTime();
		try
		{
		    date_Convert = DateTime.Parse(editDate);
		}
		catch
		{
		    lbFirstName.Text = "There was an error with the Date selection.<br />";
		    lbFirstName.Visible = true;
		}
		dateSearch = "AND [date] = #" + date_Convert + "#";
	}//Close of if "editDate"
	else
	{
	    dateSearch = "";
	}
 
    OleDbCommand dataSelect = new OleDbCommand("SELECT * FROM Scores WHERE 1 = 1 " + firstSearch + lastSearch + companySearch + teamSearch + subteamSearch + dateSearch, conn);
 
    conn.Open();
    	dgEdit.DataSource = dataSelect.ExecuteReader();
    	dgEdit.DataBind();
    conn.Close();
    }
}
	
public void DG_Edit(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
    dgEdit.EditItemIndex = e.Item.ItemIndex;
    dgEdit.DataBind();
    dgEdit.Visible = true;
}
 
public void DG_Update(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
 
}
 
public void DG_Cancel(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
    dgEdit.EditItemIndex = -1;
    dgEdit.DataBind();
}
 
public void DG_Delete(object source,
System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
 
}
</script>
 
===================================
 
DATAGRID:
 
<asp:DataGrid 
			ID="dgEdit" 
			Visible="true"  
			runat="server" 
			OnCancelCommand="DG_Cancel" 
			OnDeleteCommand="DG_Delete" 
			OnEditCommand="DG_Edit" 
			OnUpdateCommand="DG_Update" 
			AutoGenerateColumns="false" 
			CellSpacing="0" 
			CellPadding="0" 
			BorderColor="#F6F5F4" 
			AlternatingItemStyle-BackColor="#FFFFFF" 
			HeaderStyle-ForeColor="#FF6600" 
			HeaderStyle-HorizontalAlign="center" 
			ItemStyle-HorizontalAlign="center">
			<HeaderStyle Font-Bold="true" />
			<columns>
				<asp:EditCommandColumn 
					ButtonType="PushButton" 
                 	EditText="Edit" 
					CancelText="Cancel"
                 	UpdateText="Update" 
                 	HeaderText="Edit Item" />
 
				<asp:BoundColumn HeaderText="First" HeaderStyle-ForeColor="#FF6600" DataField="firstName" Visible="true" />
				<asp:BoundColumn HeaderText="Last" HeaderStyle-ForeColor="#FF6600" DataField="lastName" Visible="true"  />
				<asp:BoundColumn HeaderText="Company" HeaderStyle-ForeColor="#FF6600" DataField="company" Visible="true"  />
				<asp:BoundColumn HeaderText="Team" HeaderStyle-ForeColor="#FF6600" DataField="team" Visible="true"  />
				<asp:BoundColumn HeaderText="Subteam" HeaderStyle-ForeColor="#FF6600" DataField="subteam" Visible="true"  />
				<asp:BoundColumn HeaderText="A" HeaderStyle-ForeColor="#FF6600" DataField="scoreA" Visible="true"  />
				<asp:BoundColumn HeaderText="B" HeaderStyle-ForeColor="#FF6600" DataField="scoreB" Visible="true"  />
				<asp:BoundColumn HeaderText="C" HeaderStyle-ForeColor="#FF6600" DataField="scoreC" Visible="true"  />
				<asp:BoundColumn HeaderText="D" HeaderStyle-ForeColor="#FF6600" DataField="scoreD" Visible="true"  />
				<asp:BoundColumn HeaderText="Date" HeaderStyle-ForeColor="#FF6600" DataField="date" DataFormatString="{0:d}" Visible="true" />
				<asp:ButtonColumn   
                 	HeaderText="Delete Item" 
                 	ButtonType="PushButton" 
                 	Text="Delete" 
                 	CommandName="Delete"/>
 
			</columns>		
		</asp:DataGrid>
[+][-]03/18/08 09:39 AM, ID: 21152952Accepted Solution

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About this solution

Zones: Programming for ASP.NET, WebApplications, Microsoft Programming
Tags: ASP.Net : C#
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Solution Provided By: TheLearnedOne
Participating Experts: 1
Solution Grade: B
 
[+][-]03/18/08 10:01 AM, ID: 21153195Author Comment

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