i need to delete some but i am using emp_id primary key in one table and using emp_id foreign key another one table.. now i wanna delete emp_id .. but i cant delete the row .. displaying error message .. how to delete the rows...
View 1 RepliesI am having trouble deleting three table rows using SQL. The middle table is a junctional table allowing a one to many relationship between table 1 and table 3.
Table 1
Order_Id int Primkey FK1
Name Varchar
Date Datetime
Table 2
Order_Id int PrmKey FK1
Item_Id int PrimKey FK2
Table 3
Item_Id int PrimKey FK2
Description Varchar
Price money
Acually, I want to delete all rows associated with any particular order.
I'm having a gridview in my aspx page with checkbox, User can select one or more than one record(s) at a time and clicks on delete button, Then i'm constructing an object of my DTO and adding all the checked row's Primary Key (DataKeyNames - GUID's in case) to a serializable class and generating an XML and sending it as parameter to the Stored Procedure.
My Doubt is, can i bulk delete all the rows from database table those are present in my XML document??
If it works, I can do bulk update with XML only, i already did bulk insertion by generating an XML..
My Another Question is, Will it affect the performance? Each time when i construct an DTO object and adding it to the Generic List??
WHich one is better, I mean ObjectDataSource or SQLDataSource or my XML method?
My XML will be like this
<root>
<Customer>
<CustomerID>GUID1</CustomerID>
<CustomerID>GUID2</CustomerID>
<CustomerID>GUID3</CustomerID>.....
How to delete values in case of foreign key?
[Code]....
I have two tables one named article and the other article_type, where the articles table have a foreign key column that references the article_type primary table named "article_status". so i change the name of the article_status foreign key to be article_status_id, but now each time i tried to delete an article type column it raised an error said the the article_status column cannot be found , although i did not mentioned that column in my code here is the full error :-
System.Data.SqlClient.SqlException was unhandled by user code
Message=Invalid column name 'Article_status'.
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060
LineNumber=1
Number=207
Procedure=""
Server=\.pipeE97065CB-CF67-4B sqlquery
State=1
StackTrace:
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.ExecuteReader()
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.CompiledQuery.Execute(IProvider provider, Object[] arguments)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.ExecuteKeyQuery(Object[] keyValues)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.Execute(Object instance)
at System.Data.Linq.CommonDataServices.DeferredSourceFactory`1.DeferredSource.GetEnumerator()
at System.Data.Linq.EntitySet`1.Load()
at System.Data.Linq.EntitySet`1.get_Count()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at System.Data.Linq.Table`1.DeleteAllOnSubmit[TSubEntity](IEnumerable`1 entities)
at ProfessionalNetworkWebApplication.Models.ProfessionalNetworkRepository.Delete(Article_Type article) in C:UsersUserdocumentsvisual studio 2010ProjectsProfessionalNetworkWebApplicationProfessionalNetworkWebApplicationModelsProfessionalNetworkRepository.cs:line
35
at ProfessionalNetworkWebApplication.Controllers.ArticleTypeController.Delete(Int32 id, String confirmButton) in C:UsersUserdocumentsvisual studio 2010ProjectsProfessionalNetworkWebApplicationProfessionalNetworkWebApplicationControllersArticleTypeController.cs:line
73
at lambda_method(Closure , ControllerBase , Object[] )
at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassd.<InvokeActionMethodWithFilters>b__a()
at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
InnerException:
This is my UserRoleList.aspx.cs Code where i am passing the session variable to the page Default.aspx.cs..
And the error is: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. I have gone through many pages , and tried by making the AllowDbNull property making True and then different things.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
[code]...
This is the code of the second page Default.aspx.cs where i have to user the session varaible to pass in the SQL fucntion named GetDataByUserId as shown below:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
[Code] ....
I have one table named 'dbo.ac_Products' Within this table there is a column named 'ProductId' There is also another table named 'dbo.ac_CatalogNodes' Within this table there is a column named 'CatalogNodeId' and a column named 'CatalogNodeType'
I need to delete all the rows from 'dbo.ac_Products' and 'dbo.ac_CatalogNodes' where 'ProductId' = 'CatalogNodeId' and 'CatalogNodeType' = 1
I have a datatable in which some of the rows contain a column with duplicate values. I need to be able to delete the duplicate rows and leave only one, doesn't matter which one.
The rows might look like this:
A, B, C, D
E, F, G, D
H, I, J, D
I need to delete two rows and be left with only one.
1 - Is it necessary to have foreign key to obtain a Relation in Entity Framework between each entity.?
2 - I have a Language Table and many many table with a foreign key related to the language table. Is it right to add this foreign key or I should do something else ?
Ex:
Language
LangID
LangName
TableTextA
TblAID
TextInfo
LangID
TableTextB
TblBID
TextInfo
LangID
TableTextC
TblCID
TextInfo
LangID
etc ...
How to delete related data.
Ex:
Tables:
1) Account: ID,UserName,Pass
2) Campaign: ID,AccountID,Date,Balance
3) CampaignSpec: ID,CampaignID,Spec,Color
Note: Account.ID = Campaign.AccountID and Campaign.ID = CampaignSpec.CampaignID
what i want do is to when the user click on Delete button i want to highlight the entire row and ask for confirmation before it deletes, and the below is my code and iw ant to execute two steps:
1) hightlight the entire row2) ask the for confirmation.
protected void gvOrg_RowDataBound(object sender, GridViewRowEventArgs e)
{
Button btnDelete = (Button)e.Row.FindControl("btnDelete");
[code]...
In my databse i have a databse tables
UserRole -UserID,UserName,RoleName.
Compaign - CompaignId,Region,CompaignName,LOB.
Employee -EmpNo,EmpName,CompignId
Timesheet -TimeId,EmpNo,Date.
I dont have primary key for Compaign Table CompaignId is Identity column. Now i want to use CompaignId in Employee Table because based on compaign user will retrieve employee data in Front end. Again Employee table doesn't have primary key. I am uploading excel file data to databse but in excel file there is no empNo so i cannot use primaryKey i have EmpName in excel file. How to solve this issue. How to use master table if possible create table structure for my requirements.
I have two tables, which is table 'A' and table 'B'. Table B contains a foreign key that is referenced to table 'A'. The question now is, could I used an option in my project in visual studio an 'Others specify'? I believed that it's not possible, isn't it?If I have a selection that is bound to a datasource then is it possible to make an option 'Others specify' without adding the specified value to the database, which in turn would not have a unique ID? Table B contains the table A ID PK field, and all values from table A to table B should contain a unique ID.
View 2 RepliesHow do I remove duplicate rows from a data table based upon a two column values;I want to pass in a Data Table and a column names and get the data table back with data rows where that columns value are unique.
I have a Data Table with Duplicate Rows i want to delete the duplicates rows based upon two column values if both columns values are there then Delete the row.
I am trying to delete row(s) from the DataTable conditionally but I cant.
Actually I have DataList with CheckBox (default value checked=false). I am bindind DataList at run time using DataView (Dataview is created fromDataTable).
I also have <asp:Button ID="btnDelete" ....> which I am using to delete checked items in the DataList (But this functionality is not working).
The user first "checked" items in the DataList and click the the button "btnDelete". Here nothing is being deleted (?) and the DataList appears with all the items"unchecked" (even those which the the "checked" by the user). protected void btnDelete_Click(object sender, EventArgs e) . In this function I am checking state of the checkbox before deleting the row in the DataTable.
On PostBack generated by the "btnDelete", DataList appears with checkboxes unchecked therefore nothing is being deleted
Here is the DataList
[Code]....
Following is the .cs file
[Code]....
ihave grid in which i want to delete selected rows (checkbox selected)
i have written code as follow but on click on delete button it delete all.
[Code]....
I've have to delete multiple rows from database in a table . Which is the best way to delete data to optimize performance of sql server as well as asp.net.
View 6 RepliesI have a database table that stores a list of friends. The table can store many friends and there can be duplicates, for example - John is James' and davids' friend. John will be in the table twice but will be linked to the others via another data-member. What i dont want is james to be down as johns friend twice in the table. I'm doing a small social network and this is possible by james accepting john as his friend twice. Is there anything to check if there are 2 columns identical?
View 3 RepliesHow to write a delete query which can delete a specific row from grid view? I wrote this :
DeleteCommand="DELETE FROM member"
It delete all my entry in table called member. =(
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:FYPConnectionString %>"
SelectCommand="SELECT * FROM [member]" DeleteCommand="DELETE FROM member"></asp:SqlDataSource>
To what way student is useful Dropdownlist1(Good,Fair,Poor) When i select the Dropdpownlist1 in that select the Poor POPUP Screen will open. the POPUP Screen as follows Negative_Feed_Back Textbox1(In that textbox type the reason for Poor) OK (Button) When user click the OK (Button) the select dropdownlist and Remarks will be displayed in the gridview In gridview as follows Dropdown Remarks 0 Student performance is not good Suppose if user wrongly type the reason for poor want to change means in that case he can change reason for poor and click the ok button. In that case two Poor reasons are there in gridview as follows Dropdown Remarks 0 Student performance is not good 0 The Students not good at all in that case i want to delete the first First Row of the gridview. Output as follows Dropdown Remarks 0 The Students not good at all
My code as follows
private void SetDropdowndetails(string Dropdownname, Int32 Dropdownid)
{
string SelectedDropdown = string.Empty;
SelectedDropdown = Dropdownname.ToString();
hfnegativefeedback.Value = Dropdownid.ToString();
[code]....
When I run my above code shows error as follows Column 'Remarks' does not belong to underlying table 'Table1'. The above error shows in the below function as follows :
DataTable dt = new DataTable();
dt = (DataTable)ViewState["Remarks"];
dt = dt.DefaultView.ToTable(true, "Dropdown", "Remarks");
gvnegative.DataSource = dt;
gvnegative.DataBind();
I have a grid in which multiple delete is to be implemented but before deletion it should show confrmation box which will ask to delete or not.
But this confirmation bo must be an ajax modal popup extender confirmation box not javascript.
My code for multiple delete:
protected void annDelete_Click(object sender, EventArgs e) {
foreach (GridViewRow row in GridView1.Rows) {
CheckBox cb = (CheckBox)row.FindControl("chk_delete");
if (cb.Checked && cb != null) {
{
modalconfirmbox.show();
int ID_No = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value);
//code to delete where id =ID_No and bindgrid
} }
} }
This delete code is working and confirmation is appering. but you click yes or no or click none in modalconfirm rows will be deleted.
I am new to sql. I got this task to design a table in sql. It has for columns user_ID(PK, FK1) , WebSite_ID (PK, FK2), Create_Dt, Update_Dt How do I create PK and Fk1 and PK FK2 in sql server 2008 R2
View 3 RepliesI need ms sql video, in which i can learn how to set primary and foreign key.. why it useful and how it works...
View 3 RepliesI have four tables namely tblStudent, tblParent, tblEmployee and tblUnwantedVisitor.
tblUnwantedVisitor should get the primary key from the three tables, which is the visitor ID, tblStudent visitor ID starts from 10000, tblEmployee from 20000 and tblEmployee from 30000.
I used foreign key from one to one table only, so I don't know if my approach for the database is wrong or foreign key for multiple tables, which is somehow unlikely, is necessary.
I want to delete the rows present in the DataTable by using LINQ (with out looping)
The deleted rows will be come from a LINQ as below
IEnumerable<DataRow> MobileQuery = (from d in dtBillDetail.AsEnumerable()
where (String.Compare(d.Field<string>("Destination"), "MOBILE", StringComparison.InvariantCultureIgnoreCase) == 0) select d );
The DataRows present in the "MobileQuery" should be deleted in the DataTable "dtBillDetail"