[英]loading a data table into a data grid view problems
我試圖從我的SQL Server中獲取信息,然后根據用戶選擇的參數將其加載到datagridview中。 我在此問題結尾處發布的示例在程序的較早函數中起作用,但現在不是。 這使我相信問題出在將數據實際輸出到DGV的生產線上。 關於為什么它沒有填滿DGV的任何想法? 我提供了兩個示例,兩個示例都不起作用。 由於某種原因,即使我從調試中知道他們確實確實已從服務器成功提取信息,他們也沒有將任何信息輸入DGV。
SqlConnection DBConnection = new SqlConnection(ConnectionString);
//Opens the connection
DBConnection.Open();
//Creates a string to hold the query
string query = "SELECT * FROM PRD WHERE PRD_NUM LIKE '" +OutputBeforeIncrement + "%'";
//Creates an SQLCommand object to hold the data returned by the query
SqlCommand queryCommand = new SqlCommand(query, DBConnection);
//Uses the aforementioned SQLCommand to create an SQLDataReader object
SqlDataReader queryCommandReader = queryCommand.ExecuteReader();
//Creates a DataTable to hold the data
DataTable dataTable = new DataTable();
//This part actually loads the data from the query into the table
dataTable.Load(queryCommandReader);
dgvOutput.DataSource = dataTable;
另一個例子:
using (SqlDataAdapter newDA = new SqlDataAdapter(query, DBConnection))
{
DataTable Table = new DataTable();
newDA.Fill(Table);
dgvOutput.DataSource = Table;
}
您可以嘗試以下方法或類似方法:
SqlDataAdapter myDataAdapter;
SqlCommandBuilder myCommandBuilder;
SqlCommand mySqlCommand = new SqlCommand(myQuery, MySQLConnection);
//I think this is the default command type, and thus can be omitted
mySqlCommand.CommandType = CommandType.Text;
myDataAdapter = new SqlDataAdapter(mySqlCommand);
//Automates your insert/update/delete
myCommandBuilder = new SqlCommandBuilder(myDataAdapter);
myDataAdapter.Fill(myDataTable);
dgvOutput.DataSource = myDataTable.DefaultView;
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