Maximum request length exceeded

Hello, I have a simple gridview that I want to allow editing with. Very simple really. The data populates correctly, But when you click on the edit button you get the error below. What could be causing this? I've ton of these and have never seen this error.
Exception Details: System.Web.HttpException: Maximum request length exceeded.

Stack Trace:
[HttpException (0x80004005): Maximum request length exceeded.]
   System.Web.HttpRequest.GetEntireRawContent() +293
   System.Web.HttpRequest.FillInFormCollection() +173
   System.Web.HttpRequest.get_Form() +64
   System.Web.HttpRequest.get_HasForm() +79
   System.Web.UI.Page.GetCollectionBasedOnMethod(Boolean dontReturnNull) +63
   System.Web.UI.Page.DeterminePostBackMode() +134
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +251

Here is the code:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="CUSTNMBR"
                        <asp:CommandField ShowEditButton="True" />
                        <asp:BoundField DataField="CUSTNMBR" HeaderText="CUSTNMBR" ReadOnly="True" SortExpression="CUSTNMBR" />
                        <asp:BoundField DataField="CUSTNAME" HeaderText="CUSTNAME" SortExpression="CUSTNAME" />
                        <asp:BoundField DataField="CUSTCLAS" HeaderText="CUSTCLAS" SortExpression="CUSTCLAS" />
                <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:TESTConnectionString %>"
                    SelectCommand="SELECT [CUSTNMBR], [CUSTNAME], [CUSTCLAS] FROM [RM00101] ORDER BY [CUSTCLAS], [CUSTNAME]"
                    UpdateCommand="UPDATE [RM00101] SET [CUSTNAME] = @CUSTNAME, [CUSTCLAS] = @CUSTCLAS WHERE [CUSTNMBR] = @CUSTNMBR">
                        <asp:Parameter Name="CUSTNMBR" Type="String" />
                        <asp:Parameter Name="CUSTNAME" Type="String" />
                        <asp:Parameter Name="CUSTCLAS" Type="String" />
                        <asp:Parameter Name="CUSTNMBR" Type="String" />
                        <asp:Parameter Name="CUSTNMBR" Type="String" />
                        <asp:Parameter Name="CUSTNAME" Type="String" />
                        <asp:Parameter Name="CUSTCLAS" Type="String" />


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I believe that the problem is in regards to how much data you are passing back up to the server when you click your edit button.   By default only allows up to 4MB of data to be passed up in a request.   Because of this, if your datagrid and all the data included with it is greater than that limit then it will throw this error.   Some pages will see this error if you have a lot of controls and use viewstate because the viewstate will be huge and will be posted back even if not using it.   Here is an article talking about the problem and how to solve it. The quickest thing to try is to update the webconfig to use a larger maxRequestLength value.   See the article for more detail on this.
Looks like it is being caused by SQL Server: check the field length in SQL Table and the field length that is posted for insertion.

How big is your viewstate? Is that causing it? Use something like Fiddler or ieHttpHeaders to inspect the length of the request you are sending, as jjardine says, it is likely that it is over the limit ASP.NET allows, or the web server is restricted to.

gogetsomeAuthor Commented:
jjardine thanks for the info. Adding  <httpRuntime maxRequestLength="8192" /> to the web.config as stated in the article fixed the issue.
I hope your network is fast if your pages are that big ;-)
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