在ASP.NET C#中从Datatable返回值(所有字段)到AJAX [英] Returning Value(all fields) from Datatable to AJAX in ASP.NET C#
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问题描述
我在网上搜索了所有内容,但找不到答案,也许你们可以帮忙.我是ASP.NET C#的新手
I've searched all over the net but I didn't find the answer maybe you guys can help. I am new to ASP.NET C#
我的aspx.cs代码
My aspx.cs code
[WebMethod]
[ScriptMethod]
public static string GetData(int ID)
{
string SQL = "Select ID, FirstName, MiddleName, LastName from tbl_demo1 where ID = '" + ID + "'";
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(SQL, cn);
da.Fill(dt);
if(dt.Rows.Count > 0)
{
return dt.Rows[0].ItemArray[0].ToString();
}
return "";
}
问题:在这一部分
return dt.Rows[0].ItemArray[0].ToString();
在这一部分中,我想返回所有字段(ID,FirstName,MiddleName,LastName)..我该怎么做?
In this part I want to return all fields(ID, FirstName, MiddleName, LastName) .. How would I do it?
推荐答案
以下是您要求的代码部分:
Here is the part of code that you asked:
if (dt.Rows.Count > 0)
{
DataRow row = dt.Rows[0];
string str = row["ID"].ToString() + row["FirstName"].ToString() + row["MiddleName"].ToString() + row["LastName"].ToString();
return str;
}
如果您想将其作为KVP数组返回,请使用以下内容
If you want to return it as an KVP array, use like below
SortedList<string, string> rowObj = new SortedList<string, string>();
rowObj.Add("ID", row["ID"].ToString());
rowObj.Add("FirstName", row["FirstName"].ToString());
rowObj.Add("MiddleName", row["MiddleName"].ToString());
rowObj.Add("LastName", row["LastName"].ToString());
return (new JavaScriptSerializer().Serialize(rowObj));
可以使用jQuery调用:
Can be called using jQuery:
jQuery.ajax({
type: "POST",
url: "YourFileService.asmx/GetData",
data: "{'ID':" + ID + "}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
if (typeof data.d != "undefined") {
var res = JSON.parse(data.d);
alert(res.FirstName)
} else {
if (window.console) {
console.log('Unknown error,');
}
}
},
error: function (xhr, errorType, exception) {
//raise an error
alert(xhr.responseText);
},
failure: function (response) {
//failure, raise an error
alert(response.responseText);
}
});
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