conversion

Question

How can I convert a value given by a DataRow cell to double?

Tuhin Paul · Answer

You can convert a DataRow cell value to double using several methods. Using Convert.ToDouble() DataRow row = dataTable.Rows[0]; double value = Convert.ToDouble(row["ColumnName"]); This method handles null values (converts to 0.0 ) and works with various numeric types. You can also use double.TryParse() DataRow row = dataTable.Rows[0]; object cellValue = row["ColumnName"]; if (double.TryParse(cellValue?.ToString(), out double value)) { // Use 'value' here - conversion was successful Console.WriteLine($"Converted value: {value}"); } else { // Handle conversion failure Console.WriteLine("Could not convert to double"); // You might want to use a default value value = 0.0; // or whatever default makes sense } Choose the method that best fits your data certainty and error handling requirements!

Sandhiya Priya · Answer

To convert a value from a DataRow cell to a double in C#, you have a few safe options depending on whether the value can be null or might not be convertible. Here’s a detailed guide: 1. Using Convert.ToDouble double value = Convert.ToDouble(row["ColumnName"]); Pros: Handles null and DBNull.Value by throwing an exception. Cons: Will throw if the value is null or not numeric. Example with null check: double value = row["ColumnName"] != DBNull.Value ? Convert.ToDouble(row["ColumnName"]) : 0.0; 2. Using double.TryParse This is safer if the data might be a string or may fail conversion. double value; bool success = double.TryParse(row["ColumnName"]?.ToString(), out value); if (success) { Console.WriteLine("Value: " + value); } else { value = 0; // default } Pros: Won’t throw exceptions. Cons: Needs extra handling if null . 3. Using casting (if you’re sure the type is numeric) double value = (double)row["ColumnName"]; Only works if the underlying type is already double . Will throw InvalidCastException if it isn’t. Best Practice If you’re dealing with a database column that might contain NULL or string numeric values: double value = 0.0; if (row["ColumnName"] != DBNull.Value) { double.TryParse(row["ColumnName"].ToString(), out value); }

Jayraj Chhaya · Answer

double value = Convert.ToDouble(row["ColumnName"]); (or row.Field ("ColumnName") if the column is already numeric).

conversion

Insert Link

Embed YouTube Video

Table Options

Insert Image

Answers (3)