Convert DataRow to Dictionary using LINQ

Convert DataRow to Dictionary using LINQ

Here's an example of how to convert a DataRow to a Dictionary<string, object> using LINQ in C#:

var row = dataTable.Rows[0]; var dict = dataTable.Columns .Cast<DataColumn>() .ToDictionary(c => c.ColumnName, c => row[c.ColumnName]);

In the example above, we first get the DataRow object from the DataTable. We then use LINQ to convert the columns of the DataTable to a dictionary, where the keys are the column names and the values are the corresponding values in the DataRow. The Cast method is used to convert the DataColumnCollection to an IEnumerable<DataColumn>, and the ToDictionary method is used to create the dictionary.

Note that this example assumes that the DataTable has at least one row. If the DataTable is empty, you will need to handle that case separately.

Examples

  1. "C# convert DataRow to Dictionary using LINQ with column names as keys"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => column.ColumnName, column => row[column]);
    • Description: Utilizes LINQ to convert a DataRow to a Dictionary, where column names become keys and corresponding values are used as values.

  2. "C# convert DataRow to Dictionary using LINQ with selected columns"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var selectedColumns = new[] { "Column1", "Column2" }; var dictionary = selectedColumns.ToDictionary(column => column, column => row[column]);
    • Description: Uses LINQ to convert a DataRow to a Dictionary, including only selected columns in the resulting dictionary.

  3. "C# convert DataRow to Dictionary using LINQ with column types"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => column.ColumnName, column => new KeyValuePair<Type, object>(column.DataType, row[column]));
    • Description: Converts a DataRow to a Dictionary using LINQ, where column names are keys and values are KeyValuePair<Type, object> containing column types and values.

  4. "C# convert DataRow to Dictionary using LINQ with specific column types"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var columnTypes = new Dictionary<string, Type> { { "Column1", typeof(int) }, { "Column2", typeof(string) } }; var dictionary = columnTypes.ToDictionary(column => column.Key, column => Convert.ChangeType(row[column.Key], column.Value));
    • Description: Utilizes LINQ to convert a DataRow to a Dictionary, explicitly specifying expected column types for conversion.

  5. "C# convert DataRow to Dictionary using LINQ with null handling"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => column.ColumnName, column => row[column] ?? DBNull.Value);
    • Description: Uses LINQ to convert a DataRow to a Dictionary, handling null values by replacing them with DBNull.Value.

  6. "C# convert DataRow to Dictionary using LINQ with camelCase keys"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => Char.ToLowerInvariant(column.ColumnName[0]) + column.ColumnName.Substring(1), column => row[column]);
    • Description: Converts a DataRow to a Dictionary using LINQ, transforming column names into camelCase keys.

  7. "C# convert DataRow to Dictionary using LINQ with value transformation"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => column.ColumnName, column => TransformValue(row[column])); object TransformValue(object value) { // Custom transformation logic return value?.ToString().ToUpper(); }
    • Description: Utilizes LINQ to convert a DataRow to a Dictionary, applying custom value transformation logic.

  8. "C# convert DataRow to Dictionary using LINQ with excluded columns"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var excludedColumns = new[] { "ExcludeColumn1", "ExcludeColumn2" }; var dictionary = row.Table.Columns.Cast<DataColumn>() .Where(column => !excludedColumns.Contains(column.ColumnName)) .ToDictionary(column => column.ColumnName, column => row[column]);
    • Description: Converts a DataRow to a Dictionary using LINQ, excluding specified columns from the resulting dictionary.

  9. "C# convert DataRow to Dictionary using LINQ with custom key selector"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => CustomKeySelector(column.ColumnName), column => row[column]); string CustomKeySelector(string columnName) { // Custom key selection logic return columnName.ToUpper(); }
    • Description: Utilizes LINQ to convert a DataRow to a Dictionary with a custom key selector function for column names.

  10. "C# convert DataRow to Dictionary using LINQ with string comparison"

    • Code:
      DataRow row = GetDataRowFromSomewhere(); var dictionary = row.Table.Columns.Cast<DataColumn>() .ToDictionary(column => column.ColumnName, StringComparer.OrdinalIgnoreCase, column => row[column]);
    • Description: Converts a DataRow to a Dictionary using LINQ, performing case-insensitive string comparison for column names.

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