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SQL query to allow user to search

Posted By:      Posted Date: October 12, 2010    Points: 0   Category :ASP.Net

In my webpage I have a textbox where the user can type information that they want to search by.  I need to take the user input and build a sql query to return records.  I have tested my query in sql and it works hardcoding parameters, however I am having trouble getting the user input dynamically and populating my query string.  Can someone help me figure out how to get the user input to populate my query string???

Here is my code:

 //Define query
        string sql = "SELECT CustomerID, FirstName, LastName, Email, City, State, Phone FROM dbo.Customer WHERE (FirstName LIKE '@SearchParms') OR (LastName LIKE '@SearchParms') OR (City LIKE '@SearchParms') OR (State LIKE '@SearchParms') ORDER BY LastName, FirstName";

        //Declare the Command
        SqlCommand cmd = new SqlCommand(sql, Conn);

        //Add the parameters needed for the SQL query
        cmd.Parameters.AddWithValue("@SearchParms", '%' + txtCustSearch.Text + '%');  

        //Declare a SQL adapter
        SqlDataAdapter da = new SqlDataAdapter(sql, Conn);
        //Declare a DataTable
        DataTable dt = new DataTable();

        //Populate the DataTable

        //Bind to listview
        lv.DataSource = dt;


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