I am very new to c# and .net in general.
Im getting a nullreference error, shocker.
I have a simple form to add a new article to a database. the end goal is to be able to upload an image to the webserver and save content and the image name in a mssql database. I am using a formview control defaulted to the insert view.
I added a Literal to the insert view and I am trying to change the text of that literal to the username of the current user ( its going on an intranet site so windows auth). When I try to set the text of the literal i get the nullreference.
Code:
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace testcms2.eat
{
public partial class add : System.Web.UI.Page
{
public string now;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void FormViewCommandEventHandler(Object sender, FormViewCommandEventArgs e)
{
//doesnt work yet
if (e.CommandName == "Add")
{
errors.Text = "You tried to submit something";
errorcontainer.Visible = true;
}
}
protected void FormView1_DataBound(object sender, EventArgs e)
{
DateTime now = DateTime.Now;
String strName;
strName = HttpContext.Current.User.Identity.Name.ToString();
TextBox postedby = FormView1.FindControl("PostedBy") as TextBox;
TextBox posteddate = FormView1.FindControl("PostedDate") as TextBox;
postedby.Text = strName.ToString();//get the error here on the postedby object I assume
posteddate.Text = now.ToString();
}
}
}
Code:
<%@ Page Title="" Language="C#" MasterPageFile="~/CMS.Master" AutoEventWireup="true" CodeBehind="add.aspx.cs" Inherits="testcms2.eat.add" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<asp:Panel ID="errorcontainer" CssClass="errorcontainer" runat="server" EnableViewState="false">
<asp:Literal ID="errors" runat="server">
</asp:Literal>
</asp:Panel>
<asp:FormView ID="FormView1" runat="server" CellPadding="4"
DataKeyNames="ID_EAT" DataSourceID="SqlDataSource1" ForeColor="#333333"
DefaultMode="Insert" OnItemCommand="FormViewCommandEventHandler"
ondatabound="FormView1_DataBound">
<EditItemTemplate>
ID_EAT:
<asp:Label ID="ID_EATLabel1" runat="server" Text='<%# Eval("ID_EAT") %>' />
<br />
Title:
<asp:TextBox ID="TitleTextBox" runat="server" Text='<%# Bind("Title") %>' />
<br />
Article:
<asp:TextBox ID="ArticleTextBox" runat="server" Text='<%# Bind("Article") %>' />
<br />
URL:
<asp:TextBox ID="URLTextBox" runat="server" Text='<%# Bind("URL") %>' />
<br />
Image1:
<asp:TextBox ID="Image1TextBox" runat="server" Text='<%# Bind("Image1") %>' />
<br />
ModifiedDate:
<asp:TextBox ID="ModifiedDateTextBox" runat="server"
Text='<%# Bind("ModifiedDate") %>' />
<br />
PostDate:
<asp:TextBox ID="PostDateTextBox" runat="server"
Text='<%# Bind("PostDate") %>' />
<br />
PostedBy:
<asp:TextBox ID="PostedByTextBox" runat="server"
Text='<%# Bind("PostedBy") %>' />
<br />
<asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True"
CommandName="Update" Text="Update" />
<asp:LinkButton ID="UpdateCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel" Text="Cancel" />
</EditItemTemplate>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<InsertItemTemplate>
Title:
<asp:TextBox ID="TitleTextBox" runat="server" Text='<%# Bind("Title") %>' />
<br />
Article:
<asp:TextBox ID="ArticleTextBox" runat="server" Text='<%# Bind("Article") %>' />
<br />
URL:
<asp:TextBox ID="URLTextBox" runat="server" Text='<%# Bind("URL") %>' />
<br />
Image1:
<asp:TextBox ID="Image1TextBox" runat="server" Text='<%# Bind("Image1") %>' />
<br />
PostDate:
<asp:Literal ID="PostDate" runat="server"></asp:Literal>
<br />
PostedBy:
<asp:Literal ID="PostedByUsername" runat="server"></asp:Literal>
<br />
<asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True"
CommandName="Insert" Text="Insert" />
</InsertItemTemplate>
<ItemTemplate>
ID_EAT:
<asp:Label ID="ID_EATLabel" runat="server" Text='<%# Eval("ID_EAT") %>' />
<br />
Title:
<asp:Label ID="TitleLabel" runat="server" Text='<%# Bind("Title") %>' />
<br />
Article:
<asp:Label ID="ArticleLabel" runat="server" Text='<%# Bind("Article") %>' />
<br />
URL:
<asp:Label ID="URLLabel" runat="server" Text='<%# Bind("URL") %>' />
<br />
Image1:
<asp:Label ID="Image1Label" runat="server" Text='<%# Bind("Image1") %>' />
<br />
ModifiedDate:
<asp:Label ID="ModifiedDateLabel" runat="server"
Text='<%# Bind("ModifiedDate") %>' />
<br />
PostDate:
<asp:Label ID="PostDateLabel" runat="server" Text='<%# Bind("PostDate") %>' />
<br />
PostedBy:
<asp:Label ID="PostedByLabel" runat="server" Text='<%# Bind("PostedBy") %>' />
<br />
<asp:LinkButton ID="EditButton" runat="server" CausesValidation="False"
CommandName="Edit" Text="Edit" />
<asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False"
CommandName="Delete" Text="Delete" />
<asp:LinkButton ID="NewButton" runat="server" CausesValidation="False"
CommandName="New" Text="New" />
</ItemTemplate>
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
</asp:FormView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:WebOperationsConnectionString %>"
DeleteCommand="DELETE FROM [12_EAT] WHERE [ID_EAT] = @ID_EAT"
InsertCommand="INSERT INTO [12_EAT] ([Title], [Article], [URL], [Image1], [ModifiedDate], [PostDate], [PostedBy]) VALUES (@Title, @Article, @URL, @Image1, @ModifiedDate, @PostDate, @PostedBy)"
SelectCommand="SELECT [ID_EAT], [Title], [Article], [URL], [Image1], [ModifiedDate], [PostDate], [PostedBy] FROM [12_EAT]"
UpdateCommand="UPDATE [12_EAT] SET [Title] = @Title, [Article] = @Article, [URL] = @URL, [Image1] = @Image1, [ModifiedDate] = @ModifiedDate, [PostDate] = @PostDate, [PostedBy] = @PostedBy WHERE [ID_EAT] = @ID_EAT">
<DeleteParameters>
<asp:Parameter Name="ID_EAT" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Article" Type="String" />
<asp:Parameter Name="URL" Type="String" />
<asp:Parameter Name="Image1" Type="String" />
<asp:Parameter Name="ModifiedDate" Type="DateTime" />
<asp:Parameter Name="PostDate" Type="DateTime" />
<asp:Parameter Name="PostedBy" Type="String" />
</InsertParameters>
<UpdateParameters>
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Article" Type="String" />
<asp:Parameter Name="URL" Type="String" />
<asp:Parameter Name="Image1" Type="String" />
<asp:Parameter Name="ModifiedDate" Type="DateTime" />
<asp:Parameter Name="PostDate" Type="DateTime" />
<asp:Parameter Name="PostedBy" Type="String" />
<asp:Parameter Name="ID_EAT" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
</asp:Content>
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