Dataset updating row
Let’s look into the code (Replace this code at “Save Data Set Changes to Database” section above.
Sql Command Builder command Builder = new Sql Command Builder(adp); adp.
Now we use this Data Set as a Data Source of any of the Data Control like; Grid View, List View etc for showing this Data to User.
Now sometime we have a requirement like, some rows of that Data Set (having Data Table) may get Updated with new values and some may have been Deleted or there may be another possibility of Insertion of new row in that table.
This happens because the CASE expression supplies a missing value to the SET clause, and the Population column is multiplied by a missing value, which produces a missing value.
While you are updating or inserting rows in a table, you might receive an error message that the update or insert cannot be performed.
The examples in this section update the original NEWCOUNTRIES table.
Updated Population Values Name Capital Population ------------------------------------------------------ Brazil Brasilia 168,325,875 China Beijing 1,262,325,831 India New Delhi 975,459,576 Indonesia Jakarta 212,513,552 Russia Moscow 158,644,478 United States Washington 276,459,548 If you want to update some, but not all, of a column's values, then use a WHERE expression in the UPDATE statement.
For more information about updating views, see Updating a View.
I will performe insert,delete and update operation on Data Set (Data Table) on Page_Load event. Step 3: Now we will update these changes to Database with the help of Update method of Sql Data Adapter object. Anything which is not clear to you, Please feel free to ask.
As I told Data Set track changes to it’s row in the form of Row State.
You can use multiple UPDATE statements, each with a different expression.
However, each UPDATE statement can have only one WHERE clause.