I am developing a C# VS 2008 / SQL Server 2008 website. I have a Gridview. I included the Default.aspx and aspx.cs files below. But when I build this I get the below error:
The Type ‘_Default’ already contains a
definition for ‘btnOWrite’
What do I need to do to fix this? I am not getting any errors now; just that this grid does not show up. Thanks!
ASPX file:
<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="Server">
<asp:Panel runat="server" ID="AuthenticatedMessagePanel">
<asp:Label runat="server" ID="WelcomeBackMessage"></asp:Label>
<table>
<tr>
<td>
<asp:Label ID="tableLabel" runat="server" Font-Bold="True" Text="Select target table:"></asp:Label>
</td>
<td>
<asp:Label ID="inputLabel" runat="server" Font-Bold="True" Text="Select input file:"></asp:Label>
</td>
</tr>
<tr>
<td valign="top">
<asp:Label ID="feedbackLabel" runat="server"></asp:Label>
<asp:SqlDataSource ID="SelectTables" runat="server" ConnectionString="<%$ ConnectionStrings:AdventureWorks3_SelectTables %>"
SelectCommand="getTableNames" SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:QueryStringParameter DefaultValue="Person" Name="SchemaName" QueryStringField="SchemaName"
Type="String" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" DataSourceID="SelectTables" runat="server" Style="width: 400px;"
CellPadding="4" ForeColor="#333333" GridLines="None" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
AutoGenerateSelectButton="True" DataKeyNames="TABLE_NAME">
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>
<asp:BoundField HeaderText="TABLE_NAME" DataField="TABLE_NAME" />
</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</td>
<td valign="top">
<input id="uploadFile" type="file" size="26" runat="server" name="uploadFile" title="UploadFile" class="greybar" enableviewstate="True" />
</td>
</tr>
</table>
<table>
<tr>
<td style="width:150px; height:50px"></td>
<td valign="bottom" style="width:150px; height:50px">
<input id="btnOWrite" type="submit" value="Overwrite Data" runat="server" class="greybar"
onserverclick="btnOWrite_Click" name="btnOWrite" />
</td>
<td style="width:100px"></td>
<td valign="bottom" style="width:150px; height:50px">
<input id="btnAppend" type="submit" value="Append Data" runat="server" class="greybar" onserverclick="btnAppend_Click" name="btnAppend" />
</td>
</tr>
</table>
</asp:Panel>
<asp:Panel runat="Server" ID="AnonymousMessagePanel">
<asp:HyperLink runat="server" ID="lnkLogin" Text="Log In" NavigateUrl="~/Login.aspx">
</asp:HyperLink>
</asp:Panel>
</asp:Content>
ASPX.CS file:
public partial class _Default : System.Web.UI.Page
//namespace AddFileToSQL
{
//protected System.Web.UI.HtmlControls.HtmlInputFile uploadFile;
protected System.Web.UI.HtmlControls.HtmlInputButton btnOWrite;
protected System.Web.UI.HtmlControls.HtmlInputButton btnAppend;
protected System.Web.UI.WebControls.Label Label1;
protected static string inputfile = "";
public static string targettable;
public static string selection;
// Number of controls added to view state
protected int default_NumberOfControls
{
get
{
if (ViewState["default_NumberOfControls"] != null)
{
return (int)ViewState["default_NumberOfControls"];
}
else
{
return 0;
}
}
set
{
ViewState["default_NumberOfControls"] = value;
}
}
protected void uploadFile_onclick(object sender, EventArgs e)
{
}
protected void Load_GridData()
{
//GridView1.DataSource = ADONET_methods.DisplaySchemaTables();
//GridView1.DataBind();
}
protected void btnOWrite_Click(object sender, EventArgs e)
{
if (uploadFile.PostedFile.ContentLength > 0)
{
feedbackLabel.Text = "You do not have sufficient access to overwrite table records.";
}
else
{
feedbackLabel.Text = "This file does not contain any data.";
}
}
protected void btnAppend_Click(object sender, EventArgs e)
{
string fullpath = Page.Request.PhysicalApplicationPath;
string path = uploadFile.PostedFile.FileName;
if (File.Exists(path))
{
// Create a file to write to.
try
{
StreamReader sr = new StreamReader(path);
string s = "";
while (sr.Peek() > 0)
s = sr.ReadLine();
sr.Close();
}
catch (IOException exc)
{
Console.WriteLine(exc.Message + "Cannot open file.");
return;
}
}
if (uploadFile.PostedFile.ContentLength > 0)
{
inputfile = System.IO.File.ReadAllText(path);
Session["Message"] = inputfile;
Response.Redirect("DataMatch.aspx");
}
else
{
feedbackLabel.Text = "This file does not contain any data.";
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (Request.IsAuthenticated)
{
WelcomeBackMessage.Text = "Welcome back, " + User.Identity.Name + "!";
// Reference the CustomPrincipal / CustomIdentity
CustomIdentity ident = User.Identity as CustomIdentity;
if (ident != null)
WelcomeBackMessage.Text += string.Format(" You are the {0} of {1}.", ident.Title, ident.CompanyName);
AuthenticatedMessagePanel.Visible = true;
AnonymousMessagePanel.Visible = false;
if (!Page.IsPostBack)
{
Load_GridData();
}
}
else
{
AuthenticatedMessagePanel.Visible = false;
AnonymousMessagePanel.Visible = true;
}
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
targettable = row.Cells[2].Text;
}
}
when you have a control made declaritively such as
it instantiates a private member variable named
someID. If you look at your class, you’ll see this lineBasically, you’ve declared 2 controls with the same name. One in the mark up and one in the code behind. Just delete the declaration from your code behind file.