How to Correctly Pass Parameters to ADO.NET INSERT Commands?

Passing Parameters to ADO.NET Commands

In order to insert a record into a database using an ADO.NET command, parameters should be utilized. The example provided faces an issue due to an incomplete implementation:

SqlCommand comand = new SqlCommand("INSERT INTO Product_table Values(@Product_Name,@Product_Price,@Product_Profit,@p)", connect);
SqlParameter ppar = new SqlParameter();
ppar.ParameterName = "@Product_Name";
ppar.Value = textBox1.Text;
MessageBox.Show("Done");
comaand.Parameters.Add(ppar);

To resolve this issue and correctly add parameters, follow these steps:

SqlCommand cmd = new SqlCommand("INSERT INTO Product_table Values(@Product_Name, @Product_Price, @Product_Profit, @p)", connect);
cmd.Parameters.Add("@Product_Name", SqlDbType.NVarChar, ProductNameSizeHere).Value = txtProductName.Text;
cmd.Parameters.Add("@Product_Price", SqlDbType.Int).Value = txtProductPrice.Text;
cmd.Parameters.Add("@Product_Profit", SqlDbType.Int).Value = txtProductProfit.Text;
cmd.Parameters.Add("@p", SqlDbType.NVarChar, PSizeHere).Value = txtP.Text;
cmd.ExecuteNonQuery();

In this code:

• Provide the column names before the values in the INSERT statement.
• Specify the data type of each parameter using SqlDbType.
• Set the maximum size for parameters with variable-length data types.
• Avoid using AddWithValue as it can lead to security vulnerabilities.

This approach ensures that parameters are properly added to the command and the record is successfully inserted into the database.

The above is the detailed content of How to Correctly Pass Parameters to ADO.NET INSERT Commands?. For more information, please follow other related articles on the PHP Chinese website!