DLL version issue and SQL Parameters Issue

1. 在工程中Reference dll: 

   1).specify version: true or false should be same.Other wise, there will be conflick between these dlls expecily that have depence.

   2). We can set all of them are true or all false.

2.SqlException: The parameterized query ## expects the pa... RSS

Resolved.

        public void UpdateTableInfo(string command, string dbTableName, DataTable dataTable, IList<string> parameters) 
        { 
            _dataAdapter.InsertCommand = new SqlCommand(@command); 
            IList tableColumnTypes = GetTableColumnTypes(dbTableName); 
            for (int i = 0; i < parameters.Count; i++) 
            { 
                _dataAdapter.InsertCommand.Parameters.Add(new SqlParameter("@" + parameters[i], tableColumnTypes[i])); 
                _dataAdapter.InsertCommand.Parameters["@" + parameters[i]].SourceVersion = DataRowVersion.Current; 
                _dataAdapter.InsertCommand.Parameters["@" + parameters[i]].SourceColumn = dataTable.Columns[i].ColumnName; 
            } 
            SqlConnection conn = DbConnection; 
            _dataAdapter.InsertCommand.Connection = conn; 
            using (conn) 
            { 
                _dataAdapter.Update(dataTable.DataSet, dbTableName); 
            } 
        }

 

I'm wondering if my problem possibly has to do with null or empty values in my DataTable ("dataTable"). The exception error seems to imply that a parameter value was not supplied in the parameterized query? Like the value of @Value0 was empty or null in my DataTable (for a particular row)?

If this is the case, how can I handle empty or null values in my DataTable so that this problem does not arise? Insert a DbNull value into my database for each empty or null value in the DataTable? How might that be best accomplished? I guess I would have to allow NULL values in my database table to do this?

 

转载于:https://www.cnblogs.com/Jessy/archive/2011/06/02/2068552.html