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Question : Regional settings GREEK , decimal separator "," sql server 2000, But does not update a textbox tha binds to a float field,C# framework 2.0
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I want a textbox whose text property is bind to a float field in sql server 2000.
The pc has regional settings GREEK and the decimal point is comma ",".So I change the default language for user to GREEK in sql server 2000.I remark that the float values in sql server database have comma separator.But when I set a float value in a textBox that binds to a float field , exception appears "Error converting data type nvarchar to float."The text property is bind to the float field.In the textBox I set for example "23,56".
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if (textBoxFPA.Text != "")
cmdInsertDoc.Parameters.AddWithValue("@FPA", textBoxFPA.Text);
else
cmdInsertDoc.Parameters.AddWithValue("@FPA", DBNull.Value);
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cmdInsertDoc.CommandText = "Update Documents set ID_NUMBER = @ID_NUMBER," +
"SUPPLIER_AFM = @Supplier_AFM," +
"PRODUCT_TYPE = @Prod_type," +
"PRODUCT = @Prod_ID," +
"PRODUCT_DETAIL = @Prod_Details," +
"DATETIME_version = @Date_Version," +
"DATETIME_RECEIPT = @Date_Receipt," +
"TOTAL_PRICE = @TotalPrice," +
"PRICE_PER_QUANTITY = @PricePerQuantity," +
"TYPE_QUANTITY = @TypeQuantity," +
"PAYED = @IsPayed," +
"MONEYPAYED = @MoneyPayed," +
"MONEYREST = @MoneyRest," +
"ORDER_ID = @OrderID," +
"FPA = @FPA," + "Quantity=@Quantity" +
string.Format(" where ID_NUMBER = {0}", (int)dataGridViewDocuments.CurrentRow.Cells[0].Value);
cmdInsertDoc.Connection = dOCUMENTSTableAdapter.Connection;
cmdInsertDoc.Connection.Open();
cmdInsertDoc.ExecuteNonQuery();
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Answer : Regional settings GREEK , decimal separator "," sql server 2000, But does not update a textbox tha binds to a float field,C# framework 2.0
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Oops, sorry - I missed that the SQL data type "float" is 8 bytes, which corresponds to C#'s "double" type, not "float".
You have found a correct answer.
cmdInsertDoc.Parameters.AddWithValue("@FPA", double.Parse(textBoxFPA.Text));
Though, you may consider checking first whether or not the text box contains a valid value for a double:
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if (textBoxFPA.Text.Trim() != "")
{
double fpa;
if (!double.TryParse(textBoxFPA.Text, out fpa))
{
MessageBox.Show("textBoxFPA contains an invalid value.");
return;
}
cmdInsertDoc.Parameters.Add(new SqlParameter("@FPA", System.Data.SqlDbType.Float, sizeof(double))).Value = fpa;
}
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