What is the field name in datarowextensions?
Field (this System.Data.DataRow row, string columnName); A generic parameter that specifies the return type of the column. The input DataRow, which acts as the this instance for the extension method. The name of the column to return the value of. The value, of type T, of the DataColumn specified by columnName.
Why is the colon in the string format?
The resulting output was: OK, I’d never encountered that before and have no clue why the colon caused an issue. A solution suggested in the document was to put a space (which is silly because then you change the output): Another suggestion was to use this format (new to me!):
Why do I have a colon in my filename?
It’s probable from the filename you provided that the character you have in your filenames is not a literal colon :, which is a reserved character in Windows filenames, but a fullwidth colon ： Instead. It’s a Unicode character that looks very much like a colon, visually surrounded by spaces that you can’t remove.
When to use a colon in a variable name?
The colon is a valid character for variable names, e.g. in $Env:PATH, etc. Back to the colon. There is a special case for variable names that correspond to an item on a PSDrive:
Are there nullable types in datarowextensions.field method?
A Language-Integrated Query (LINQ) expression that accessed a column with a null value would generate a InvalidCastException at run time. Additionally, DataSet does not support nullable types. The Field method provides support for accessing columns as nullable types.
Which is the this instance for the extension method?
The input DataRow, which acts as the this instance for the extension method. The input DataColumn object that specifies the column to return the value of. A DataRowVersion enumeration that specifies the version of the column value to return, such as Current or Original version.
Are there any warranties for the datarowextensions method?
Microsoft makes no warranties, express or implied, with respect to the information provided here. Provides strongly-typed access to each of the column values in the DataRow. Provides strongly-typed access to each of the column values in the specified row. The Field (DataRow, DataColumn) method also supports nullable types.