Cannot Insert The Value NULL Into Column...

May 7, 2007

I am trying to create a drop down list with the possible usernames that you can send an email to.  Everything works fine except for the dropdown list and I get the following error message:
Cannot insert the value NULL into column 'EmailTo', table 'db191165913.dbo191165913.Email'; column does not allow nulls. INSERT fails.
The statement has been terminated

My code is below:

<%@ Page Language="VB" MasterPageFile="~/real_world/realworld_MasterPage.master" AutoEventWireup="false" CodeFile="send_messages.aspx.vb" Inherits="send_messages" title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
&nbsp;<asp:Label ID="email_label" runat="server" Visible="False"></asp:Label>
<asp:SqlDataSource ID="emailsend_source" runat="server" ConnectionString="<%$ ConnectionStrings:IMS_DB %>"
DeleteCommand="DELETE FROM WHERE [EmailID] = @EmailID"
InsertCommand="INSERT INTO ([UserID], [EmailTo], [EmailFrom], [Subject], [Message], [Status], [Reply], [Forward], [UserName], [SentOn], [IP], [BrowserInfo], [DNSInfo]) VALUES (@UserID, @EmailTo, @EmailFrom, @Subject, @Message, '@Status', '@Reply', '@Forward', @UserName, @SentOn, @IP, @BrowserInfo, @DNSInfo)"
SelectCommand="SELECT * FROM WHERE ([UserID] = @UserID)"
UpdateCommand="UPDATE SET [UserID] = @UserID, [EmailTo] = @EmailTo, [EmailFrom] = @EmailFrom, [Subject] = @Subject, [Message] = @Message, [Status] = @Status, [Reply] = @Reply, [Forward] = @Forward, [UserName] = @UserName, [BrowserInfo] = @BrowserInfo, [DNSInfo] = @DNSInfo WHERE [EmailID] = @EmailID">
<DeleteParameters>
<asp:Parameter Name="EmailID" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="UserID" />
<asp:Parameter Name="EmailTo" Type="String" />
<asp:Parameter Name="EmailFrom" Type="String" />
<asp:Parameter Name="Subject" Type="String" />
<asp:Parameter Name="Message" Type="String" />
<asp:Parameter Name="Status" Type="String" />
<asp:Parameter Name="Reply" Type="String" />
<asp:Parameter Name="Forward" Type="String" />
<asp:Parameter Name="UserName" Type="String" />
<asp:Parameter Name="BrowserInfo" Type="String" />
</UpdateParameters>
<SelectParameters>
<asp:ControlParameter ControlID="email_label" Name="UserID" PropertyName="Text" />
</SelectParameters>
<InsertParameters>
<asp:Parameter Name="UserID" />
<asp:Parameter Name="EmailTo" Type="String" />
<asp:Parameter Name="EmailFrom" Type="String" />
<asp:Parameter Name="Subject" Type="String" />
<asp:Parameter Name="Message" Type="String" />
<asp:Parameter Name="Status" Type="String" />
<asp:Parameter Name="Reply" Type="String" />
<asp:Parameter Name="Forward" Type="String" />
<asp:Parameter Name="UserName" Type="String" />
<asp:Parameter Name="IP" Type="String" />
<asp:Parameter Name="SentOn" Type="datetime" />
<asp:Parameter Name="BrowserInfo" Type="String" />
<asp:Parameter Name="DNSInfo" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="username_email" runat="server" ConnectionString="<%$ ConnectionStrings:IMS_DB %>"
SelectCommand="SELECT [UserName] FROM [Membership] ORDER BY [UserName]">
</asp:SqlDataSource>
<asp:ValidationSummary ID="ValidationSummary1" runat="server" HeaderText="You must fill out the following forms:"
ValidationGroup="email_send" />
&nbsp;
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="EmailID"
DataSourceID="emailsend_source" DefaultMode="Insert" GridLines="None" Height="50px"
Width="125px">
<Fields>
<asp:BoundField DataField="EmailID" HeaderText="EmailID" InsertVisible="False" ReadOnly="True"
SortExpression="EmailID" />
<asp:TemplateField HeaderText="To" SortExpression="EmailTo">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("EmailTo") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
&nbsp;&nbsp;<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="emailsend_source" DataTextField="UserName" SelectedValue='<%# Bind("UserName") %>' AppendDataBoundItems="True" DataValueField="UserName">
<asp:ListItem>-- Receiving User --</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="DropDownList1"
Display="Dynamic" ErrorMessage="Message Receiver (To)" ValidationGroup="email_send"></asp:RequiredFieldValidator>
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("EmailTo") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="From" SortExpression="EmailFrom">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("EmailFrom") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:LoginName ID="login_name" runat="server" />
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("EmailFrom") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Subject" SortExpression="Subject">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Subject") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" MaxLength="50" Text='<%# Bind("Subject") %>'
ValidationGroup="send_email"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox3"
Display="Dynamic" ErrorMessage="Subject" ValidationGroup="email_send"></asp:RequiredFieldValidator>
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("Subject") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Message" SortExpression="Message">
<EditItemTemplate>
<asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("Message") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:TextBox ID="TextBox4" runat="server" Columns="40" MaxLength="500" Rows="10"
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<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="TextBox4"
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<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Bind("Message") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField InsertText="Send Message" ShowInsertButton="True" ValidationGroup="email_send" />
</Fields>
</asp:DetailsView>
</asp:Content>

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Server Error in '/' Application.


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[SqlException (0x80131904): Cannot insert the value NULL into column 'OrderID', table 'outman.outman.Contact'; column does not allow nulls. INSERT fails.]
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All I want is if the user does not enter a date in a textbox to to send a NULL value to the DB instead of having the db enter the default value as 1/1/1900.
Thank you

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Jun 17, 2008

 Hi,I have SQL Server DB, and I tried to insert some data. I used StorProc to do the insertion as follows:ALTER PROCEDURE dbo.InsertPage        (    @PageID int,    @ParID int,    @ChiID int,    @PageContent ntext    )AS        INSERT INTO MP_Page                            (PageID, ParID, ChiID, PageContent)      VALUES     (@PageID,@ParID,@ChiID,@PageContent)    RETURNThe problem happened when I tired to insert int null value in field ChiID which is allow null and here is my codeprivate void InsertPage(PagesDB PageDB, out pagedetails pages)        {            if (txtChild.Text == "")            {                int varChildID;                varChildID = int.Parse(txtChild.Text.Trim());                pages = new pagedetails(int.Parse(ddlParent.SelectedValue.Trim()), varChildID,                int.Parse(txtPageID.Text.Trim()), FTB.Text.Trim());            }            else            {                pages = new pagedetails(int.Parse(ddlParent.SelectedValue.Trim()), int.Parse(txtChild.Text.Trim()),                int.Parse(txtPageID.Text.Trim()), FTB.Text.Trim());            }                PageDB.InsertPage(pages);        } the error message says Input string was not in a correct format.Any idea ??Thank you  

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Jan 28, 2005

Hi all

Iam having some problems with null values

try
{
cmd.Parameters["@fmv"].Value = Convert.ToDecimal(TextBox13.Text);
}
catch
{
cmd.Parameters["@fmv"].Value =System.Data.SqlTypes.SqlDecimal.Null;
}

for Empty Textbox values
i am getting the following error,

System.Data.SqlTypes.SqlNullValueException: Data is Null. This method or property cannot be called on Null values.

My Database is allowed to accept null values.

System.Data.SqlType.SqlDatetime.Null works but SqlDecimal.Null does not work.

Could any one help me with this?

Thanks

Raj

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Oct 18, 2007

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Apr 30, 2008

i have a table which has a column with datetime datatype... there is an application which inserts a blank space '' but gets inserts the value 1/1/1900 in that table. . is there any way which inserts a NULL into the table

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