“System.Web.UI.WebControls.GridViewUpdatedEventArgs”并不包含“RowIndex”的定义 关于RowUpdated和RowUpdating

RowUpdated和RowUpdating

　当使用 Update 时，每一个更新的数据行都会发生两个事件。执行顺序如下：

将 DataRow 中的值移至参数值。

引发 OnRowUpdating 事件。

执行命令。

如果该命令设置为 FirstReturnedRecord，返回的第一项结果将放置在 DataRow 中。

如果存在输出参数，它们将被放在 DataRow 中。

引发 OnRowUpdated 事件。

调用 AcceptChanges。

下面的示例演示正在使用的 RowUpdating 和 RowUpdated 事件。

public static void CreateDataAdapter(
    string connectionString)
...{
    using (OleDbConnection connection = new OleDbConnection(connectionString))
    ...{
        OleDbDataAdapter adapter = new OleDbDataAdapter(
            "SELECT * FROM Customers WHERE CustomerID = ''ALFKI''", connection);

        adapter.InsertCommand = new OleDbCommand(
            "INSERT INTO Customers (CustomerID, CompanyName) VALUES(?, ?)",
            connection);

        adapter.InsertCommand.Parameters.Add(
            "@CustomerID", OleDbType.VarChar, 5, "CustomerID");
        adapter.InsertCommand.Parameters.Add(
            "@CompanyName", OleDbType.VarChar, 30, "CompanyName");

        connection.Open();

        DataSet custDS = new DataSet();
        adapter.Fill(custDS, "Customers");

        DataRow custRow = custDS.Tables["Customers"].NewRow();
        custRow["CustomerID"] = "NEWCO";
        custRow["CompanyName"] = "New Company";
        custDS.Tables["Customers"].Rows.Add(custRow);

        // add handlers
        adapter.RowUpdating += new OleDbRowUpdatingEventHandler(OnRowUpdating);
        adapter.RowUpdated += new OleDbRowUpdatedEventHandler(OnRowUpdated);

        adapter.Update(custDS, "Customers");

        // remove handlers
        adapter.RowUpdating -= new OleDbRowUpdatingEventHandler(OnRowUpdating);
        adapter.RowUpdated -= new OleDbRowUpdatedEventHandler(OnRowUpdated);

        foreach (DataRow row in custDS.Tables["Customers"].Rows)
        ...{
            if (row.HasErrors)
                Console.WriteLine(row.RowError);
        }
    }
}

protected static void OnRowUpdating(object sender,
    OleDbRowUpdatingEventArgs args)
...{
    if (args.StatementType == StatementType.Insert)
    ...{
        System.IO.TextWriter writer = System.IO.File.AppendText("Inserts.log");
        writer.WriteLine("{0}: Customer {1} Inserted.",
            DateTime.Now, args.Row["CustomerID"]);
        writer.Close();
    }
}

protected static void OnRowUpdated(object sender, OleDbRowUpdatedEventArgs args)
...{
    if (args.Status == UpdateStatus.ErrorsOccurred)
    ...{
        args.Row.RowError = args.Errors.Message;
        args.Status = UpdateStatus.SkipCurrentRow;
    }
}
 

using System;
using System.Data;
using System.Data.OleDb;

class Class1
...{
    static void Main()
    ...{
        string x = "Provider=SQLOLEDB;Data Source=(local);Integrated Security=SSPI;Initial Catalog=Northwind";
        CreateDataAdapter(x);
    }

    public static void CreateDataAdapter(
        string connectionString)
    ...{
        using (OleDbConnection connection = new OleDbConnection(connectionString))
        ...{
            OleDbDataAdapter adapter = new OleDbDataAdapter(
                "SELECT * FROM Customers WHERE CustomerID = ''ALFKI''", connection);

            adapter.InsertCommand = new OleDbCommand(
                "INSERT INTO Customers (CustomerID, CompanyName) VALUES(?, ?)",
                connection);

            adapter.InsertCommand.Parameters.Add(
                "@CustomerID", OleDbType.VarChar, 5, "CustomerID");
            adapter.InsertCommand.Parameters.Add(
                "@CompanyName", OleDbType.VarChar, 30, "CompanyName");

            connection.Open();

            DataSet custDS = new DataSet();
            adapter.Fill(custDS, "Customers");

            DataRow custRow = custDS.Tables["Customers"].NewRow();
            custRow["CustomerID"] = "NEWCO";
            custRow["CompanyName"] = "New Company";
            custDS.Tables["Customers"].Rows.Add(custRow);

            // add handlers
            adapter.RowUpdating += new OleDbRowUpdatingEventHandler(OnRowUpdating);
            adapter.RowUpdated += new OleDbRowUpdatedEventHandler(OnRowUpdated);

            adapter.Update(custDS, "Customers");

            // remove handlers
            adapter.RowUpdating -= new OleDbRowUpdatingEventHandler(OnRowUpdating);
            adapter.RowUpdated -= new OleDbRowUpdatedEventHandler(OnRowUpdated);

            foreach (DataRow row in custDS.Tables["Customers"].Rows)
            ...{
                if (row.HasErrors)
                    Console.WriteLine(row.RowError);
            }
        }
    }

    protected static void OnRowUpdating(object sender,
        OleDbRowUpdatingEventArgs args)
    ...{
        if (args.StatementType == StatementType.Insert)
        ...{
            System.IO.TextWriter writer = System.IO.File.AppendText("Inserts.log");
            writer.WriteLine("{0}: Customer {1} Inserted.",
                DateTime.Now, args.Row["CustomerID"]);
            writer.Close();
        }
    }

    protected static void OnRowUpdated(object sender, OleDbRowUpdatedEventArgs args)
    ...{
        if (args.Status == UpdateStatus.ErrorsOccurred)
        ...{
            args.Row.RowError = args.Errors.Message;
            args.Status = UpdateStatus.SkipCurrentRow;
        }
    }
今天在使用gridview时出现一个低级错误.

朋友们我有个低级问题,我用GridView编辑功能时,查找不出里面的TextBox
string classname = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim();
其实e.RowIndex怎么点都不出来,要怎么设置才能点出来啊
“System.Web.UI.WebControls.GridViewUpdatedEventArgs”并不包含“RowIndex”的定义

原因是我选用的是RowUpdated而非RowUpdating这两个事件是不同的....

里面RowUpdating才能有这个选项:RowIndex,RowUpdated则没有....

应用得太少....要多加练习了!!!

文章出处：DIY部落(http://www.diybl.com/course/1_web/webjs/200855/114463.html)