I'm having problems with creating detele functionality to my asp.net page. I have found lots of bits of code indicating parts of how to do it, but not in its entirety. Could someone display it in a more complete version so I could have something to compare and figure out what i am doing wrong?
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The DELETE statement conflicted with the REFERENCE constraint "FK_EquipmentStatus_MeetEquip". The conflict occurred in database "D:MEETINGROOMAPAPP_DATADATABASE.MDF", table "dbo.EquipmentStatus", column 'Fk_MeetEquip'.
I'm getting this error when i'm trying to delete a listboxitem. It's true that an other table (EquipmentStatus) is using the primary key attached to the listboxitem, but how can i delete all the rows that causes this problem? I've seen an example using stored procedure, but i dont understand it, since i haven't really worked with it before:
ALTER TABLE t2
DROP CONSTRAINT FK_t1id
ALTER TABLE t2
ADD CONSTRAINT FK_t1id FOREIGN KEY (t1id) REFERENCES t1 (t1id) ON DELETE
CASCADE
My listbox is using MeetEquip table which p-key is MeetEquip.ID, and the fk-key (which generates the problem) is fk_MeetEquip from EquipmentStatus table.
I am getting the following error The DELETE statement conflicted with the REFERENCE constraint "FK_Person_Country_CountryID_CountryID". The statement has been terminated. I do not want the user to delete the country if there are any FK contrains. Or a better way will be to ask the user if they want to delete the records referencing this "Country".
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I have a GridView and on a row being deleted I trigger the GridView1_RowDeleting sub, but I receive an error "LINQ to Entities does not recognize the method 'System.Web.UI.WebControls.TableCell get_Item(Int32)' method, and this method cannot be translated into a store expression." Code is:
Private Sub GridView1_RowDeleting(sender As Object, e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles GridView1.RowDeleting
' The deletion of the individual row is automatically handled by the GridView.
Dim dbDelete As New pbu_housingEntities
' Remove individual from the bed.
Dim remove_bed = From p In dbDelete.Beds _
Where p.occupant = GridView1.Rows(e.RowIndex).Cells(3).Text _
Where p.room = GridView1.Rows(e.RowIndex).Cells(6).Text _
Where p.building = GridView1.Rows(e.RowIndex).Cells(5).Text _
Order By p.id Descending _
Select p
remove_bed.First.occupant = ""
dbDelete.SaveChanges()
' Increase number of open spaces in room.
Dim update_occupancy = From p In dbDelete.Rooms _
Where p.room1 = GridView1.Rows(e.RowIndex).Cells(6).Text
Where p.building = GridView1.Rows(e.RowIndex).Cells(5).Text _
Select p
update_occupancy.First.current_occupancy = update_occupancy.First.current_occupancy - 1
dbDelete.SaveChanges()
End Sub
The specific line erroring out is: remove_bed.First.occupant = ""
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When the user hits the Enter Key I want to go through and validate some fields and kick it back to the user if a fields doesnt' validate. With the above code, the btnEnter_Click still is getting called even though I have it to return. I tried return false; too incase I misunderstood something.BTW, yes the code is falling into the Else Statement when stepping through code.
When i try to delete a record, and the record is link to another table, so i will get the following error:
View 3 Repliesin generate the Stored Procedures when using Create TableAdapter configuration Wizard in VS.it can not generate the Stored Procedures for Delete and Update Commands, but it generated for Select and Insert. i tried many times, but still get the same problem.
View 2 RepliesEdit and Delete functionality works flawlessly in Gridview if all data is pulled ONLY FROM ONE TABLE. But pulling data from one table give you ID's instead of actual values that are stored in other tables.
After creating a usable Select statement that would pull all the correct values, my Edit and Delete functionality no longer work.
Here is code.
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I"m using table adapters here. I tried to use the following in my table adapter:
ALTER TABLE tblAdvanceLInk
DROP FOREIGN KEY FK_tblAdvanceLink_tblLink
DELETE FROM [tblAdvanceLink] WHERE WebsiteID=@WebsiteID
The DELETE statement conflicted with the REFERENCE constraint "FK_tblAdvanceLink_tblLink". The conflict occurred in database "LinkExchanger", table "dbo.tblAdvanceLink", column 'LinkID'. The statement has been terminated
I get the same problem every time. So I read you could do this in a sql query. Why doesn't this work in my tableadapter? Do I have this in the right place? Do I also put this into the other table? (tblLInk) Isn't there a way to just relax ALL constraints so I can delete some rows? I'm deleting rows from both tables which have the corresponding websiteID
I'm converting a string to integer and than inserting this integer in my post table.
int currTopicID = Convert.ToInt32(id.Text);
SqlCommand cmd = new SqlCommand("INSERT INTO post VALUES(currTopicID)", con);
The problem is that currTopicID isn't being recognized as an integer when i do the insertion.
I have this C# code in a Razor view:
@(Html.CheckBoxFor<RazorSamplesWeb.Models.SamplesModel>(i => i.IsActive))
I tried translating it to this:
@Code Html.CheckBoxFor(Of RazorSamplesWeb.Models.SamplesModel)(Function(i) i.IsActive)End Code
But it's complaining. Why, and what is the right statement?
How do I get the filepath out of my code and into a insert statement for mysql?
protected void UploadButton_Click(object sender, EventArgs e)
{
string theUserId = Session["UserID"].ToString();
[code]...
how to fix my sql syntax so my code works again, i made a few manual entrys for now to see if I can get them to be displayed: The FriendUserID relates to another UserID in the usertable who has obviously a different picture and information but I dont know how to display to concurrent WallPosting's from different users atm.
my code creates a dynamic div gives the div an ID = to the userid and input the wallpost messgaes named wallpostings, it takes the information stored about the userid and applys the image related to that userid, is there any way this can be changed with sql? or have i went down a one way alley?
public partial class UserProfileWall : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
//It is a postback so check if it was by div click (NOT WORKING because the javascript isnt posting back)
string target = Request["__EVENTTARGET"];
if (target == "DivClicked")
{
string id = Request["__EVENTARGUMENT"];
//Call my delete function passing record id
using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
{
cn.Open();
using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting="+id, cn))
{
cmd.ExecuteNonQuery();
}..............
I can't find my syntax error. Here is my code behind:
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I been looking but I cant find any info on this topic Anyway I got a model that looks like this.
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I want to cascade delete a category with all its sub categories but I cant make that reference in the database, not with the option to cascade update or delete. It work fine with pagecontents and all the other I got its just this same table reference. In NHibernate I do the cascade setting hbm or with a better way using the fluent option. How do I go about this task now?
I want MVC pattern to save,update,delete.with detail code
View 3 Repliesim wondering if its possible to add a asp button to the code below, the code below adds an image and text from my database to a dynamic div on my asp page:
using System.Data.Odbc;
using System.IO;
public partial class UserProfileWall : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
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In my online shoping project i m uploading images in my Image folder
now i want to delete image when it is deleted from database.
i am using jquery upload plugin- jquery.MultiFile.js in my project to upload multiple files in this file now i need a confirm button when delete file so i changed code
if(!MultiFile.trigger('onFileRemove', slave, MultiFile)) return false;
I have two entities (Customer and CustomerRole) and would like to declare many-to-many relationship between them. I can do using the following code:
modelBuilder.Entity<CustomerRole>()
.HasMany(cr => cr.Customers)
.WithMany(c => c.CustomerRoles)
.Map(m => m.ToTable("Customer_CustomerRole_Mapping"));
But it creates the relationship (and the third mapping table) with cascade delete switched off by default. How can I tell EF to create the relationship with cascade delete switched on when using many-to-many?
I have a "UserDetail" table in my "JobPost.mdf". I have a "Gridview1" showing the column from "UserDetail" table,which has a primary key "UserName". This "UserName" is originally saved using Membership class function. Now I add a "Delete" linkbutton to the GridView1. This "Delete" is not autogenerate button,I dragged inside the column itemtemplate from ToolBox. The GridView1's columns now become "Delete_LinkButton"+"UserName"(within the UserDetail table)+"City"(within the UserDetail table)+"IsAdmin"(within the UserDetail table) What I need is that by clicking this "delete_linkButton",it will ONLY delete the entire User Entity on the same row (link by the corresponding "UserName") from the "UserDetail" table,as well as delete all information from the AspNetDB.mdf (User,Membership,UserInRole,etc). I would like to fireup a user confirm,but not mandatory. At least I am trying to make it functional in the correct way. for example:
Command UserName City IsAdmin
delete ken Los Angles TRUE
delete jim Toronto FALSE
When I click "delete" on the first row, I need all the record about "ken" inside the "UserDetail" table to be removed. Meanwhile, all the record about "ken" in the AspNetDB.mdf will be gone, including UserinRole table.....
I have a link button that I want to function as delete. I have to do it this way because I want confirmation before allowing deletes. In my debugger, I flagged this block of code and run it line by line. For some odd reason, it thinks my selected row. Maybe I'm overlooking something? Here's my code behind source:
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I have a GridView with EDIT, DELETE AND SELECT options.Now I want to include AJAX code so that on pressing DELETE or EDIT it gives me a pop-up box, confirming my action.
View 8 Repliestell me what is the best way to add Delete and Edite to a repeater control using C# code.
View 2 RepliesI am trying to get a new line when display the message. Whats wrong with this code?
Button l = (Button)e.Row.FindControl("btnDelete");
string textForMessage = @"<script language='javascript'> confirm('Are you sure you want to delete this record
test
test
test');</script>";
l.Attributes.Add("onclick", textForMessage + DataBinder.Eval(e.Row.DataItem, "Name") + ")");
