Question

我正在尝试构建一个允许使用文本区域进行批量SQL搜索的简单页面。文本框在每个新行上分开，每行作为查询参数。然后将生成的行添加到DataTable中。

查询没有问题，并且在通过调试模式检查时，我按照预期构建和返回DataTable。唯一的问题是当我尝试将DataTable绑定到gridview时，gridview没有行。

我现在一直在摸不着头脑，并且无法弄清楚为什么DataTable不会绑定。列名称全部匹配，但结果中的实际表未命名。这是一个问题吗？

这是代码。

ASPX：

    <asp:GridView 
        ID="GridView1" 
        runat="server"            
        AutoGenerateColumns="false">
        <Columns>
            <asp:BoundField DataField="SIM NUMBER" HeaderText="SIM NUMBER" />
            <asp:BoundField DataField="Voice" HeaderText="Voice" />
            <asp:BoundField DataField="IMSI" HeaderText="IMSI" />
            <asp:BoundField DataField="Tariff" HeaderText="Tariff" />
            <asp:BoundField DataField="Contract Start" HeaderText="Contract Start" />
            <asp:BoundField DataField="Supplier" HeaderText="Supplier" />
        </Columns>
    </asp:GridView>

C＃代码：

public partial class Query : System.Web.UI.Page
{
    protected static string numbers = "";
    protected static string number;
    protected static DataTable result = new DataTable();

    protected static string simNumber;
    protected static string voice;
    protected static string IMSI;
    protected static string tariff;
    protected static string contractStart;
    protected static string supplier;


    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        result.Reset();
        result.Columns.Add("SIM NUMBER", typeof(string));
        result.Columns.Add("Voice", typeof(string));
        result.Columns.Add("IMSI", typeof(string));
        result.Columns.Add("Tariff", typeof(string));
        result.Columns.Add("Contract Start", typeof(string));
        result.Columns.Add("Supplier", typeof(string));
        numbers = TextArea1.Value.ToString();
        search();
        GridView1.DataSource = result;
        GridView1.DataBind();
    }

    protected static void search()
    {
        string[] split = numbers.Split(new string[] { "\r\n" }, StringSplitOptions.None);

        foreach (string line in split)
        {
            if (line == string.Empty)
                continue;

            number = line;
            getSupplierInfo();
        }
    }

    protected static void getSupplierInfo()
    {
        DataTable DT = new DataTable();
        using (SqlConnection conn = new SqlConnection(connections.supplierInfo()))
        {
            string sql = " SELECT * FROM UnionSuppliers WHERE SIM_NUMBER LIKE @parameter ";
            conn.Open();

            using (SqlCommand select = new SqlCommand
            {
                CommandType = CommandType.Text,
                CommandTimeout = 300,
                CommandText = sql,
                Connection = conn
            })
            {                    
                select.Parameters.AddWithValue("@parameter", number);
                SqlDataAdapter adapter = new SqlDataAdapter();
                DataSet ds = new DataSet();
                adapter.SelectCommand = select;
                adapter.Fill(ds);
                DT = ds.Tables[0];
            }

        }
        foreach (DataRow dr in DT.Rows)
        {
            simNumber = dr["SIM_NUMBER"].ToString();
            voice = dr["Voice"].ToString();
            IMSI = dr["IMSI"].ToString();
            tariff = dr["Tariff"].ToString();
            contractStart = dr["Contract_start"].ToString();
            supplier = dr["Supplier"].ToString();
            addRow();
        }
    }

    protected static void addRow()
    {
        DataRow simResult = result.NewRow();

        simResult["SIM Number"] = simNumber;
        simResult["Voice"] = voice;
        simResult["IMSI"] = IMSI;
        simResult["Tariff"] = tariff;
        simResult["Contract Start"] = contractStart;
        simResult["Supplier"] = supplier;
        result.Rows.Add(simResult);
    }
}

非常感谢任何帮助。我确信它非常简单，我不知道。

由于

Answer 1

尝试更改：

AutoGenerateColumns="false"

为：

AutoGenerateColumns="true"

Answer 2

我认为你可以在aspx文件中尝试这样做

<Columns>
    <ItemTemplate> 
        <asp:Label ID="Label1" runat="server" Text='<%# Bind("Your_Field_Name") %>'></asp:Label> 
    </ItemTemplate>
</Columns>

并且在cs文件中恰好适合代码

    DataTable DT = new DataTable();
    using (SqlConnection conn = new SqlConnection(connections.supplierInfo()))
    {
        string sql = " SELECT * FROM UnionSuppliers WHERE SIM_NUMBER LIKE @parameter ";
        conn.Open();

        using (SqlCommand select = new SqlCommand
        {
            CommandType = CommandType.Text,
            CommandTimeout = 300,
            CommandText = sql,
            Connection = conn
        })
        {                    
            select.Parameters.AddWithValue("@parameter", number);
            SqlDataAdapter adapter = new SqlDataAdapter();
            DataSet ds = new DataSet();
            adapter.SelectCommand = select;
            adapter.Fill(ds);
            DT = ds.Tables[0];
        }

    }

现在将Datatable绑定到Grid View。

    GridView1.DataSource = DT;
    GridView1.DataBind();

带行的DataTable不会绑定到Gridview

2 个答案: