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plurals

PODetailsView converts TextBoxes empty string to null
primarykey
Id
7904180
data
AcceptedAnswerId
0
AnswerCount
1
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2011-10-26T14:31:18.877
FavoriteCount
0
LastActivityDate
2011-10-27T10:19:45.460
LastEditDate
2011-10-26T14:39:17.200
LastEditorUserId
972124
OwnerUserId
675082
ParentId
0
PostTypeId
1
Score
2
ViewCount
1345
LastEditorDisplayName
text
Body
I have a basic ASP.NET Web Forms application. I give the user the possibility to create the records by using a Web Form and to update them by using a DetailsView. The web form stores the empty field on the TextBoxes as *empty strin*g in the DB correctly. The DetailsView instead stores them as null fields in the DB. Moreover in the DetailsView_ItemUpdated event if I check the e.newvalues and e.oldvalues arguments the corresponding fields are null as well (throwing an exception) that means the data are already sent as null to the server upon submit. In the DetailsView I use templates and I set all Update parameters in the SQLDataSource as ConvertEmptyStringToNull="false". SQLDataSource parameter: <pre><code><asp:Parameter Name="SHELF" Type="String" ConvertEmptyStringToNull="false"/> </code></pre> DetailsView <pre><code> <asp:DetailsView runat="server" ID="GvProductDetail" AutoGenerateRows="False" DataKeyNames="rowid" DataSourceID="ProductDetailData" OnItemUpdated="gvProductDetail_ItemUpdated"> <asp:TemplateField> <HeaderTemplate>Stock Shelf &nbsp;</HeaderTemplate> <ItemTemplate> <%# Eval("Shelf") %> </ItemTemplate> <EditItemTemplate> <asp:TextBox runat="server" ID="txtShelf" Text='<%# Bind("Shelf") %>' ></asp:TextBox> </EditItemTemplate> </asp:TemplateField> </code></pre> Is that possible that Bind converts the empty values to null? I thought it was enough to set the UpdateParameters rule not to convert empty string to null but apprently there is some other surprise. anybody might help?
Tags
<asp.net><binding><detailsview><string>
Title
DetailsView converts TextBoxes empty string to null
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USEmmanuel N
UserOwnerUserId
1. USCiccioMiami
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PostLinksPostIdRelatedPostId
1. PL
 singulars
 LinkTypeLinkTypeId
 LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. VO
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 PostPostId
 PODetailsView converts TextBoxes empty string to null
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTApproveEditSuggestion
2. VO
 singulars
 PostPostId
 PODetailsView converts TextBoxes empty string to null
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. COYou might find something from [this](http://stackoverflow.com/questions/2170021/convertemptystringtonull-false-and-yet-the-conversion-still-happens) related post
 singulars
 PostPostId
 PODetailsView converts TextBoxes empty string to null
 UserUserId
 USEmmanuel N
2. CO@EmmanuelN, thanks for your answer. I already had a look before at that post and it has no answer
 singulars
 PostPostId
 PODetailsView converts TextBoxes empty string to null
 UserUserId
 USCiccioMiami

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Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.