Question

我有一个带有Sql连接的数据表，并且我正在尝试将其绑定到GridView，但是我收到的错误是找不到TypeName属性中指定的类型。我的数据表代码如下所示：

 protected void ObjectDataSource1_Selecting(object sender, ObjectDataSourceSelectingEventArgs e)
{


    if (!IsPostBack)
    {

        SqlConnection conn = new SqlConnection();
        conn.ConnectionString = "TestConnectionString";

        SqlCommand command = new SqlCommand();
        command.Connection = conn;
        command.CommandText = "SELECT* FROM TestTable";

        DataTable data = new DataTable();

        SqlDataAdapter adapter = new SqlDataAdapter(command);

        adapter.Fill(data);

        GridView1.DataSource = data;

    }

和.aspx中的代码：

 <asp:GridView ID="GridView1" runat="server" AllowSorting="True" AutoGenerateColumns="False" DataSourceID="ObjectDataSource1" >
        <Columns>
            <asp:BoundField DataField="Column1" HeaderText="Column1" ReadOnly="True" SortExpression="Column1" >
            <HeaderStyle Width="450px" />
            <ItemStyle HorizontalAlign="Center" />
            </asp:BoundField>
            <asp:BoundField DataField="Column2" HeaderText="Column2" ReadOnly="True" SortExpression="Column2" >
                <ItemStyle Width="400px" HorizontalAlign="Center" />
                </asp:BoundField>
        </Column>

    </asp:GridView>
   <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="DataTable" TypeName="data"></asp:ObjectDataSource>

关于我做错了什么的建议？

Answer 1

这不是ObjectDataSource控件的使用方式。

如果您只想在第一页加载时绑定网格，则删除ObjectDataSource控件，删除ObjectDataSource1_Selecting事件处理程序，从{{1}中删除DataSourceID属性只需在页面加载时绑定网格：

GridView

如果您想使用protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { BindGrid(); } } private void BindGrid() { using (SqlConnection conn = new SqlConnection("your connection string here")) using (SqlCommand command = new SqlCommand("SELECT * FROM TestTable", conn)) { DataTable data = new DataTable(); SqlDataAdapter adapter = new SqlDataAdapter(command); adapter.Fill(data); GridView1.DataSource = data; GridView1.DataBind(); } }控件，请为其指定有效的ObjectDataSource和TypeName，删除SelectMethod事件处理程序，并拥有ObjectDataSource1_Selecting返回数据：

SelectMethod

标记：

public static class YourDataSource
{
    public static DataTable LoadSomeData()
    {
        using (SqlConnection conn = new SqlConnection("your connection string here"))
        using (SqlCommand command = new SqlCommand("SELECT * FROM TestTable", conn))
        {
            DataTable data = new DataTable();
            SqlDataAdapter adapter = new SqlDataAdapter(command);
            adapter.Fill(data);
            return data;
        }
    }
}

如果你正在使用.NET 4.5，你也可以使用＆＃34;模型绑定＆＃34;在不使用数据源控件的情况下从代码隐藏加载数据：

<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
    TypeName="YourDataSource"
    SelectMethod="LoadSomeData" 
/>

标记：

public DataTable LoadSomeData()
{
    using (SqlConnection conn = new SqlConnection("your connection string here"))
    using (SqlCommand command = new SqlCommand("SELECT * FROM TestTable", conn))
    {
        DataTable data = new DataTable();
        SqlDataAdapter adapter = new SqlDataAdapter(command);
        adapter.Fill(data);
        return data;
    }
}

错误：找不到ObjectDataSource的TypeName属性中指定的类型

1 个答案: