Question

我从数据库中检索了数据，并将其存储在2D数组中（锯齿状）。

SqlConnection con = new SqlConnection("Data Source=COMP7;Initial Catalog=GK_Practice;User ID=sa;Password=SQLEXPRESS");
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from employee";
con.Open();

SqlDataReader rd = cmd.ExecuteReader();

int rowcount=0, columncount;

while(rd.Read())
{
    rowcount++;            
}

columncount = rd.FieldCount;
rd.Close();
rd = cmd.ExecuteReader();

string[][] str=new string[rowcount][];
int i = 0;
while(rd.Read())
{
   str[i] = new string[columncount];
   for (int j = 0; j < columncount; j++)
   {
       str[i][j] = rd.GetValue(j).ToString();
   }
   i++;
}

Label2.Text = str[1][1].ToString();
JavaScriptSerializer js = new JavaScriptSerializer();
string json = js.Serialize((object)str);
Response.Write(json);
rd.Close();
con.Close();

现在我已将其序列化以便作为JSON传递，以便在客户端（浏览器）中使用。当我说Response.Write(json);时，它会给出以下输出：

 [["1","John","xyz","12000"],["2","Mike","pqr","15000"],["3","Nick","fjdu","18000"],["4","Brad","wee","22000"]]

但我希望这些数据存储在JavaScript变量中（比如\ var x）并将其用作x [0] [1]。

这甚至可能吗？

Answer 1

您可以创建一个c＃函数并从客户端调用它。您必须在GetData函数中编写相同的代码，并且在使用JavaScriptSerializer进行序列化时将返回字符串。

var Json = <%= GetData(); %>

这将呈现这样的页面，

var Json = [["1","John","xyz","12000"],["2","Mike","pqr","15000"],["3","Nick","fjdu","18000"],["4","Brad","wee","22000"]]

您可以访问Json[0][0]之类的值将返回1。

代码

public partial class Somepage : System.Web.UI.Page
{
    public string GetData()
    {
        SqlConnection con = new SqlConnection("Data Source=COMP7;Initial Catalog=GK_Practice;User ID=sa;Password=SQLEXPRESS");
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandType = CommandType.Text;
        cmd.CommandText = "select * from employee";
        con.Open();

        SqlDataReader rd = cmd.ExecuteReader();

        int rowcount=0, columncount;

        while(rd.Read())
        {
            rowcount++;            
        }

        columncount = rd.FieldCount;
        rd.Close();
        rd = cmd.ExecuteReader();

        string[][] str=new string[rowcount][];
        int i = 0;
        while(rd.Read())
        {
           str[i] = new string[columncount];
           for (int j = 0; j < columncount; j++)
           {
               str[i][j] = rd.GetValue(j).ToString();
           }
           i++;
        }

        Label2.Text = str[1][1].ToString();
        JavaScriptSerializer js = new JavaScriptSerializer();
        string json = js.Serialize((object)str);
        rd.Close();
        con.Close();

        return json;
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        // Just to feel you this is code behind
    }
}

克林特方面（Javascript）

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">

        var Json = <%= GetData(); %>

    </script>
</head>

Answer 2

试试这个

var sb = new StringBuilder();
    sb.Append("<script>");
    sb.Append(string.Format("var jsonObj ={0}", json));
    sb.Append("</script>");
    ClientScript.RegisterStartupScript(this.GetType(), "jsonObjVar", sb.ToString());

然后在你的dom中你将拥有全局变量名jsonObj。

Answer 3

根据您使用的是MVC razor或ASP，语法会在视图上发生一些变化。使用MVC剃刀你只需将字符串放入模型变量（进入控制器）并访问页面。

var json = @model.MyString;

从C＃到Javascript的2D数组

3 个答案: