ADO.NET :: Adding New Column In Data Table Using C#?

Jan 15, 2011

i have a data table which is filled from data base, now i want to add new colum with name "Actions" and i want to add value for this column "Split". how can i do this.

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I want to copy data from a table[tblExcel][No.of columns:2] to another table[ev_event] which has 5 columns, 2 columns from the another table, 3 columns from user defined value

[code].....

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I've inherited an ASP.NET web app, and I am coming up to speed on being a DBA as well.Before I break anything, if I add a new column to a table, is there any chance it will break an existing page that does CRUD operations? The new column would not, of course, be part of the existing operations and grid controls, and if I allow it to contain a NULL (so inserts don't require value input), will I be OK?I realize that deleting a column could certainly break things. But adding a nullable column would seem to be harmless enough. (I think).

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I am working on the user registration process which uses the asp.net membership provider. When users are registered with the application, the some of the user details(emailID, password, password salt, password question, answer etc) are stored in aspnet_Membership table.

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Forms Data Controls :: Adding Values To A Table From Another Table Via Dropdown

Jan 3, 2010

I am fairly new to ASP.Net and web programming in general and I am having issues trying to add values from a dropdown list in my gridview to another table.

Here is my scenario. I have 2 tables in my SQL Express DB. When editing the values of table2 in a gridview, I would like to show some data from table1 in a dropdown so users can select a value from table 1 and enter that value in table 2.

I have the Gridview setup to show table2 data.

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posting the dropdown value from table 1 into the appropriate field in table2..

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How to handle this error

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SQL Server :: Adding A Bunch Of New Records To The English Table / Repeating The Data Entry Into The Spanish Table

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Forms Data Controls :: Error When Inserting Into Table - Cannot Insert Explicit Value For Identity Column In Table

Aug 11, 2010

I am working on a web app for an online photo album. It is the last project in Scott Mitchell's book: "ASP.Net 2.0 in 24 hours".

I am creating a page where users can enter new photo images. The functionality for uploading an image will come later. I am working on just inserting a new row into the Pictures table with an optional category, a required title and a required description.

I am getting an error when I try to insert a new row.

Here is a screenshot of the page with a shot of the dropdown list.

The Categories are user-specific. I am getting the correct values retrieved.

[URL]

There are two pretty simple database tables involved here.

NOTE: The CategoryID and PIctureID are both autoincrement integer columns.

[URL]

The page uses a DetailsView that uses a SqlDataSource that uses the Pictures table. (The DetailsView's Default Mode property is set to "Insert". The "Enable Inserting" checkbox is also checked.)

The dropdown list uses a dropdown control that uses a SqlDataSource that uses the Categories table.

When the "Insert" button is clicked the CategoryID value associated with selected (Category) Name on the dropdown list will be used along with the Title and Description values to insert a row in to the Pictures table. (If no Category value is selected, then a null value will be used for the CategoryID. This is OK because the CategoryID column in the Pictures table allows nulls.)

My problem is that I am getting this error:

Cannot insert explicit value for identity column in table 'Pictures' when IDENTITY_INSERT is set to OFF.

(FYI: I have the full version of both Visual Studio and SQL Server.)

Here is my source code for the page:

[Code]....

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I am quite new to LINQ, and I am stuck with this probably basic problem, but haven't been able to find a solution, so I thought I could ask here.

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[Code]....

Now, if I try to add to the definition of the type two columns, it says that it only messes with types, i.e. one type should be passed. So I figured I would do a ViewModel and then pass it, like this

[Code]....

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[Code]....

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I'm just wondering if anyone can assist me with this gridview problem

I have this Sql statement that outputs a gridview like this:

Job Location Activity 1 Activity 2 Activity 3

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Job2 Location2 1 0 1


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* These columns are placeholders

I want to include a footer total that looks like:

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Job2 Location2 1 0 1

Job3 Location3 0 1 0

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[code]....

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i am choosing a category from a DropDownList controll, and if want to add a new category at the same time i have a TextBoks for it, i have create a Model, BLL and DAL classes, my problem is:

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public string add(Faq inFaq)
{
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{
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{
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I'm using VB btw, i dont understand C#.

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I have an accessdatasource that pulls several columns from my users table including [userID]. Then I have a gridview that displays all this information by autofilling the columns. Finally I have added a column that I want to link to viewUser.aspx?userID=####. The #### would of course be from the query.

Here's my column that I've added:

<Columns>
<asp:HyperlinkField datatextfield="View User"
datanavigateurlfields="userID"
datanavigateurlformatstring="viewUser.aspx?userID={0}"
headertext="Link"
target="_blank" />
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This is my first time using this so I'm not sure what's wrong. I don't understand the '{0}' part and that's also where the problem lies. On the viewUser page when I print the querystring("userID") it just shows {0} as expected. How do I get my userID in there?

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moreover ,whn i clk on eack linkbutton a pop-up window has to come with submit and save and close buttons and functionality(is it better to use linkbutton or hyperlink??)...am using vs 2005

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Forms Data Controls :: Adding Total For Column Input String Error?

May 13, 2010

I have a gridview which has a total column to total each row, and i am trying to add a label to total the column i have got this far:

But am receiving this error:

Input string was not in a correct format.

Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:

[Code]....

This is my code behind:

[Code]....

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SQL Server :: Adding Data From Excel Spreadsheet To Table?

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