javascript 通过 jQuery AJAX 将字符串数组传递给 C# WebMethod
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pass string array via jQuery AJAX to C# WebMethod
提问by Shaggy
I want to pass a JavaScript string array to a C# WebMethod via jQuery (POST):
我想通过 jQuery (POST) 将 JavaScript 字符串数组传递给 C# WebMethod：
$.ajax({
type: "POST", // GET or POST or PUT or DELETE verb
url: PageURL + 'ChangeColor', // Location of the service
data: "{ 'OriginalColorHex': '" + JSON.stringify(clipartOriginalColorsHex) + "','ModifiedColorHex':'" + JSON.stringify(clipartModifiedColorsHex) +
"','OriginalColorRGB': '" + JSON.stringify(clipartOriginalColorsRGB) + "','ModifiedColorRGB':'" + JSON.stringify(clipartModifiedColorsRGB) +
"','fileName':'" + clipartFileName + "' }",
contentType: "application/json; charset=utf-8", // Content type sent to server
dataType: "json", // Expected data format from server
processdata: true, // True or False
traditional: true,
success: function (result) { // On Successful service call
console.log(result);
}
});
Data going in ajax call looks like this
ajax 调用中的数据如下所示
{ 'OriginalColorHex': '["#000000","#006565","#cccc99"]', 'ModifiedColorHex': '["#3366CC","#cc5500","#3366cc"]', 'OriginalColorRGB': '["rgb(0,0,0)","rgb(0,101,101)","rgb(204,204,153)"]', 'ModifiedColorRGB': '["rgb(51, 102, 204)","rgb(204, 85, 0)","rgb(51, 102, 204)"]', 'fileName': '179.svg' }
C# WebMethod:
C# 网络方法：
[WebMethod]
public static string ChangeClipartColor(string[] OriginalColorHex, string[] ModifiedColorHex, string[] OriginalColorRGB, string[] ModifiedColorRGB, string fileName)
{
// Code Here
}
Error
错误
{
"Message":"Cannot convert object of type \u0027System.String\u0027 to type \u0027System.String[]\u0027",
"StackTrace":" at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary`2 rawParams)\r\n at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)\r\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)",
"ExceptionType":"System.InvalidOperationException"
}
采纳答案by Nate Barbettini
Quick Fix
快速解决
JSON arrays do not need to be in quotes. This is valid JSON:
JSON 数组不需要用引号引起来。这是有效的 JSON：
{
"OriginalColorHex": [
"#000000",
"#006565",
"#cccc99"
]
}
Try validating your JSON with a tool like JSONLintto make sure it's valid. The WebMethod should be able to accept a string array just fine.
尝试使用JSONLint 之类的工具验证您的 JSON，以确保其有效。WebMethod 应该能够接受一个字符串数组就好了。
A slightly better method
稍微好一点的方法
Instead of building your JSON as a string, build an object and then let JavaScript handle the conversion for you:
不是将您的 JSON 构建为字符串，而是构建一个对象，然后让 JavaScript 为您处理转换：
var clipartOriginalColorsHex = ['#000000','#006565','#cccc99'];
var clipartModifiedColorsHex = ['#3366CC','#cc5500','#3366cc'];
var clipartOriginalColorsRGB = ['rgb(0,0,0)','rgb(0,101,101)','rgb(204,204,153)'];
var clipartModifiedColorsRGB = ['rgb(51, 102, 204)','rgb(204, 85, 0)','rgb(51, 102, 204)'];
var fileName = '179.svg';
var myData = {
OriginalColorHex: clipartOriginalColorsHex,
ModifiedColorHex: clipartModifiedColorsHex,
OriginalColorRGB: clipartOriginalColorsRGB,
ModifiedColorRGB: clipartModifiedColorsRGB,
fileName: fileName
};
$.ajax({
type: "POST", //GET or POST or PUT or DELETE verb
url: PageURL + 'ChangeColor', // Location of the service
data: JSON.stringify(myData),
contentType: "application/json; charset=utf-8", // content type sent to server
dataType: "json", //Expected data format from server
processdata: true, //True or False
traditional: true,
success: function (result) {//On Successful service call
console.log(result);
}
});
Much cleaner, less error-prone, and easier to test. Here's a fiddleto demonstrate.
更干净，更不容易出错，并且更容易测试。这里有一个小提琴来演示。
回答by leopik
Because the values are not an array. Remove the quotes around the strings that look like an array.
因为这些值不是数组。删除看起来像数组的字符串周围的引号。
{ 'OriginalColorHex': ["#000000","#006565","#cccc99"],'ModifiedColorHex':["#3366CC","#cc5500","#3366cc"],'OriginalColorRGB': ["rgb(0,0,0)","rgb(0,101,101)","rgb(204,204,153)"],'ModifiedColorRGB':["rgb(51, 102, 204)","rgb(204, 85, 0)","rgb(51, 102, 204)"],'fileName':'179.svg' }
回答by Nils O
You are passing a string ('["#000000","#006565","#cccc99"]') into a string[]. Get rid of the single quotes around your array's. This should do it:
您正在将字符串 ('["#000000","#006565","#cccc99"]') 传递到字符串 []。去掉数组周围的单引号。这应该这样做：
$.ajax({
type: "POST", //GET or POST or PUT or DELETE verb
url: PageURL + 'ChangeColor', // Location of the service
data: "{ 'OriginalColorHex': " + JSON.stringify(clipartOriginalColorsHex) + ",'ModifiedColorHex':" + JSON.stringify(clipartModifiedColorsHex) +
",'OriginalColorRGB': " + JSON.stringify(clipartOriginalColorsRGB) + ",'ModifiedColorRGB':" + JSON.stringify(clipartModifiedColorsRGB) +
",'fileName':" + clipartFileName + " }",
contentType: "application/json; charset=utf-8", // content type sent to server
dataType: "json", //Expected data format from server
processdata: true, //True or False
traditional: true,
success: function (result) {//On Successful service call
console.log(result);
}
});
});
回答by adrian3martin
You could make your life easier by waiting to stringify your data after you've put it all together.
您可以在将所有数据放在一起后等待对数据进行字符串化，从而使您的生活更轻松。
var data = {
OriginalColorHex: clipartOriginalColorsHex,
ModifiedColorHex: clipartModifiedColorsHex,
OriginalColorRGB: clipartOriginalColorsRGB,
ModifiedColorRGB: clipartModifiedColorsRGB,
fileName: clipartFileName
};
$.ajax({
type: "POST", // GET or POST or PUT or DELETE verb
url: PageURL + 'ChangeColor', // Location of the service
data: JSON.stringify(data),
contentType: "application/json; charset=utf-8", // content type sent to server
dataType: "json", // Expected data format from server
processdata: true, // True or False
traditional: true,
success: function (result) { // On Successful service call
console.log(result);
}
});
