I want to get the total amount for each ID, Can you help me how to get my desired output?Id: 1 Total Amount: 10Id: 2 Total Amount : 20Id: 3 Total Amount : 30In which i will put in a new Datatable like this.prettyprint 复制 ...
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/// <returns>返回新的DataTable</returns> public static DataTable GetTableColumn(DataTable dt, string tableName, params string[] strColumns) { DataTable dtn = new DataTable(); if (dt == null) { throw new ArgumentNullException("参数dt不能为null"); } try { dtn = dt.DefaultView.ToTabl...
df[:, "new_column"] = df[:, dt.int32(dt.f.dis)] df.head(5) 8、按条件创建新列 import datatable as dt df = dt.fread('datasets-master/BostonHousing.csv') #age列,年龄大于60赋值old,反之为new df[:, "new_column"] = dt.Frame(np.where(df[:, dt.f.age > 60], 'Old', 'New...
DataTable dt = new DataTable(); //原来的资料 dt = GetGroupedBy(dt, "Name,LogonCount,LoseeCount,LeaveCount", "Name", "Sum");private DataTable GetGroupedBy(DataTable dt, string columnNamesInDt, string groupByColumnNames, string typeOfCalculation){ //Return its own if the ...
df[:, "new_column"] = dt.Frame(np.where(df[:, dt.f.age > 60], 'Old', 'New')) df.head(5) 1. 2. 3. 4. 5. 6. 7. 8. 9、left join两个datatable.Frame import datatable as dt df1 = dt.Frame(A=[1, 2, 3, 4], B=["a", "b", "c", "d"]) ...
很简单,这样就可以解决了: DataTable dtNew2 = dt.Clone(); for (int i = 0; i < drArr.Length; i++) { dtNew2.ImportRow(drArr[i]);//ImportRow 是复制 } } //另存为一个新DataTable public void SelectColumnDataTable(DataTable dt) { //对DataTable筛选指定字段,并保存为新表。这些字段,...
Get sum of salary from employee table without using sum function in sql server Get the Array of objects in HiddenField Get the Body on HTTP POST in C# Get the current page after a call back function get the first item in a generic list get the last character of a string get the logged...
In this article, I am going to explain how to calculate the sum of the DataTable column in ASP.NET using C#. Here, I'll also explain what a DataTable is in C#, as well as different kinds of ways to calculate the sum of the DataTable column, like using th
(varkeyinDimensionList){itemObj[key]=PropertyInfoDict[key].GetValue(vm2);}foreach(varcolumninAllColumnList){vm2=listVm.FirstOrDefault(dictFunc[column]);if(vm2!=null){foreach(string nameinAllNumberField){itemObj[name+column]=PropertyInfoDict[name].GetValue(vm2);}}}listResult.Add(itemObj)...