I'm developing a small application in c# and I'm using Crystal Reports for reporting. I want to display parameter values in report header but I can't. How can i display parameter values in report header?
ClassParams.EMANET_KITAP_ID = txtKitapID.Text;
ParameterFields From = new ParameterFields();
ParameterField KID = new ParameterField();
KID.Name = "EMANET_KITAP_ID";
ParameterDiscreteValue val = new ParameterDiscreteValue();
val.Value = ClassParams.EMANET_KITAP_ID;
KID.CurrentValues.Add(val);
From.Add(KID);
crystalReportViewer1.ParameterFieldInfo = From;
class ClassParams
{
public static string KID;
public static string EMANET_KITAP_ID
{
get { return KID; }
set { KID = value; }
}
}
Most likely, you have a multi-value parameter.
Since such a parameter stores the values as an array, you need to "flatten" the array.
If it's a String parameter, you can simply create a formula like this:
Join({?yourStringParameter}, ', ' );
If the data type is not string, loop through the array and concatenate the values to a string variable.
Related
I have some word templates(maybe thousands). Each template has merge fields which will be filled from database. I don`t like writing separate code for every template and then build the application and deploy it whenever a template is changed or a field on the template is added!
Instead, I'm trying to define all merge fields in a separate xml file and for each field I want to write the "query" which will be called when needed. EX:
mergefield1 will call query "Case.Parties.FirstOrDefault.NameEn"
mergefield2 will call query "Case.CaseNumber"
mergefield3 will call query "Case.Documents.FirstOrDefault.DocumentContent.DocumentType"
Etc,
So, for a particular template I scan its merge fields, and for each merge field I take it`s "query definition" and make that request to database using EntityFramework and LINQ. Ex. it works for these queries: "TimeSlots.FirstOrDefault.StartDateTime" or
"Case.CaseNumber"
This will be an engine which will generate word documents and fill it with merge fields from xml. In addition, it will work for any new template or new merge field.
Now, I have worked a version using reflection.
public string GetColumnValueByObjectByName(Expression<Func<TEntity, bool>> filter = null, string objectName = "", string dllName = "", string objectID = "", string propertyName = "")
{
string objectDllName = objectName + ", " + dllName;
Type type = Type.GetType(objectDllName);
Guid oID = new Guid(objectID);
dynamic Entity = context.Set(type).Find(oID); // get Object by Type and ObjectID
string value = ""; //the value which will be filled with data from database
IEnumerable<string> linqMethods = typeof(System.Linq.Enumerable).GetMethods(BindingFlags.Static | BindingFlags.Public).Select(s => s.Name).ToList(); //get all linq methods and save them as list of strings
if (propertyName.Contains('.'))
{
string[] properies = propertyName.Split('.');
dynamic object1 = Entity;
IEnumerable<dynamic> Child = new List<dynamic>();
for (int i = 0; i < properies.Length; i++)
{
if (i < properies.Length - 1 && linqMethods.Contains(properies[i + 1]))
{
Child = type.GetProperty(properies[i]).GetValue(object1, null);
}
else if (linqMethods.Contains(properies[i]))
{
object1 = Child.Cast<object>().FirstOrDefault(); //for now works only with FirstOrDefault - Later it will be changed to work with ToList or other linq methods
type = object1.GetType();
}
else
{
if (linqMethods.Contains(properies[i]))
{
object1 = type.GetProperty(properies[i + 1]).GetValue(object1, null);
}
else
{
object1 = type.GetProperty(properies[i]).GetValue(object1, null);
}
type = object1.GetType();
}
}
value = object1.ToString(); //.StartDateTime.ToString();
}
return value;
}
I`m not sure if this is the best approach. Does anyone have a better suggestion, or maybe someone has already done something like this?
To shorten it: The idea is to make generic linq queries to database from a string like: "Case.Parties.FirstOrDefault.NameEn".
Your approach is very good. I have no doubt that it already works.
Another approach is using Expression Tree like #Egorikas have suggested.
Disclaimer: I'm the owner of the project Eval-Expression.NET
In short, this library allows you to evaluate almost any C# code at runtime (What you exactly want to do).
I would suggest you use my library instead. To keep the code:
More readable
Easier to support
Add some flexibility
Example
public string GetColumnValueByObjectByName(Expression<Func<TEntity, bool>> filter = null, string objectName = "", string dllName = "", string objectID = "", string propertyName = "")
{
string objectDllName = objectName + ", " + dllName;
Type type = Type.GetType(objectDllName);
Guid oID = new Guid(objectID);
object Entity = context.Set(type).Find(oID); // get Object by Type and ObjectID
var value = Eval.Execute("x." + propertyName, new { x = entity });
return value.ToString();
}
The library also allow you to use dynamic string with IQueryable
Wiki: LINQ-Dynamic
I am trying out the beta hdf5 toolkit of ilnumerics.
Currently I see H5Attributes support only ilnumerics arrays. Is there any plan to extend it for basic datatypes (such as string) as part of the final release?
Does ilnumerics H5 wrappers provide provision for extending any functionality to a particular
datatype?
ILNumerics internally uses the official HDF5 libraries from the HDF Group, of course. H5Attributes in HDF5 correspond to datasets with the limitation of being not capable of partial I/O. Besides that, H5Attributes are plain arrays! Support for basic (scalar) element types is given by assuming the array stored to be scalar.
Strings are a complete different story: strings in general are variable length datatypes. In terms of HDF5 strings are arrays of element type Char. The number of characters in the string determines the length of the array. In order to store a string into a dataset or attribute, you will have to store its individual characters as elements of the array. In ILNumerics, you can convert your string into ILArrray or ILArray (for ASCII data) and store that into the dataset/ attribute.
Please consult the following test case which stores a string as value into an attribute and reads the content back into a string.
Disclaimer: This is part of our internal test suite. You will not be able to compile the example directly, since it depends on the existence of several functions which may are not available. However, you will be able to understand how to store strings into datasets and attributes:
public void StringASCIAttribute() {
string file = "deleteA0001.h5";
string val = "This is a long string to be stored into an attribute.\r\n";
// transfer string into ILArray<Char>
ILArray<Char> A = ILMath.array<Char>(' ', 1, val.Length);
for (int i = 0; i < val.Length; i++) {
A.SetValue(val[i], 0, i);
}
// store the string as attribute of a group
using (var f = new H5File(file)) {
f.Add(new H5Group("grp1") {
Attributes = {
{ "title", A }
}
});
}
// check by reading back
// read back
using (var f = new H5File(file)) {
// must exist in the file
Assert.IsTrue(f.Get<H5Group>("grp1").Attributes.ContainsKey("title"));
// check size
var attr = f.Get<H5Group>("grp1").Attributes["title"];
Assert.IsTrue(attr.Size == ILMath.size(1, val.Length));
// read back
ILArray<Char> titleChar = attr.Get<Char>();
ILArray<byte> titleByte = attr.Get<byte>();
// compare byte values (sum)
int origsum = 0;
foreach (var c in val) origsum += (Byte)c;
Assert.IsTrue(ILMath.sumall(ILMath.toint32(titleByte)) == origsum);
StringBuilder title = new StringBuilder(attr.Size[1]);
for (int i = 0; i < titleChar.Length; i++) {
title.Append(titleChar.GetValue(i));
}
Assert.IsTrue(title.ToString() == val);
}
}
This stores arbitrary strings as 'Char-array' into HDF5 attributes and would work just the same for H5Dataset.
As an alternative solution you may use HDF5DotNet (http://hdf5.net/default.aspx) wrapper to write attributes as strings:
H5.open()
Uri destination = new Uri(#"C:\yourFileLocation\FileName.h5");
//Create an HDF5 file
H5FileId fileId = H5F.create(destination.LocalPath, H5F.CreateMode.ACC_TRUNC);
//Add a group to the file
H5GroupId groupId = H5G.create(fileId, "groupName");
string myString = "String attribute";
byte[] attrData = Encoding.ASCII.GetBytes(myString);
//Create an attribute of type STRING attached to the group
H5AttributeId attrId = H5A.create(groupId, "attributeName", H5T.create(H5T.CreateClass.STRING, attrData.Length),
H5S.create(H5S.H5SClass.SCALAR));
//Write the string into the attribute
H5A.write(attributeId, H5T.create(H5T.CreateClass.STRING, attrData.Length), new H5Array<byte>(attrData));
H5A.close(attributeId);
H5G.close(groupId);
H5F.close(fileId);
H5.close();
i have an app which has btn to preview report made in crystal report. I added Dataset as datasource of the report and dragged datatable from the toolbox and added the fields I need as columns. I got the instruction from this link http://aspalliance.com/2049_Use_LINQ_to_Retrieve_Data_for_Your_Crystal_Reports.2. This is my 2nd report the first one works and did not encounter any prob at all that is why i am confused, not to mention it also has nullable column. the error says: DataSet does not support System.Nullable<>.
private void ShowReportView()
{
string reportFile = "JudgeInfoFMReport.rpt";
ObservableCollection<tblJudgeFileMaint> judgeFileMaintList;
judgeFileMaintList = GenerateReport();
if (judgeFileMaintList.Count > 0)
{
CrystalReportViewerUC crview2 = new CrystalReportViewerUC();
crview2.SetReportPathFile(reportFile, judgeFileMaintList);
crview2.ShowDialog();
}
else
{
System.Windows.MessageBox.Show("No record found.", module, MessageBoxButton.OK, MessageBoxImage.Information);
}
}
private ObservableCollection<tblJudgeFileMaint> GenerateReport()
{
var result = FileMaintenanceBusiness.Instance.GetAllJudgeInfoList();
return new ObservableCollection<tblJudgeFileMaint>(result);
}
The error is in the part where I set datasource report.SetDataSource
public bool SetReportPathFile(string reportPathFile, IEnumerable enumerable)
{
string reportFolder = #"\CrystalReportViewer\Reports\";
string filename = System.Windows.Forms.Application.StartupPath + reportFolder + reportPathFile; // "\\Reports\\CrystalReports\\DateWiseEmployeeInfoReport.rpt";
ReportPathFile = filename;
report.Load(ReportPathFile);
report.SetDataSource(enumerable);
report.SetDatabaseLogon("sa", "admin007");
bRet = true;
}
_IsLoaded = bRet;
return bRet;
}
I read some answers and says I should set the null value to DBNUll which I did in the properties window of each column if it is nullable. Can anyone help me please? thanks
Your question can be seen in this post, but in a generic way ... that way you can pass an Object to a DataSet typed!
.NET - Convert Generic Collection to DataTable
figured it out. by using a collectionextention, copied somewhere, I forgot the link. Os to whoever it is who made the class, credits to you.
class method looks like this.
public statis class CollectionExtension {
public static DataSet ToDataSet<T>(this IEnumerable<T> collection, string dataTableName)
{
if (collection == null)
{
throw new ArgumentNullException("collection");
}
if (string.IsNullOrEmpty(dataTableName))
{
throw new ArgumentNullException("dataTableName");
}
DataSet data = new DataSet("NewDataSet");
data.Tables.Add(FillDataTable(dataTableName, collection));
return data;
}
}
then you can use it by doing this in getting your source to your report:
private DataSet GenerateNeutralContEducReport(string dsName)
{
var contEduHistoryList = FileMaintenanceBusiness.Instance.GetManyNeutralFMContEducHistoryInfobyKeyword(CurrentNeutralFM.NeutralID, "NeutralID").ToList();
return CollectionExtensions.ToDataSet<tblContinuingEducationHistory>(contEduHistoryList, dsName);
}
I found little help from the other proposed answers but this solution worked.
A different way to solve this problem is to make the data column nullable.
DataColumn column = new DataColumn("column", Type.GetType("System.Int32"));
column.AllowDBNull = true;
dataTable.Columns.Add(column);
https://learn.microsoft.com/en-us/dotnet/api/system.data.datacolumn.allowdbnull?view=netcore-3.1
foreach (PropertyDescriptor property in properties)
{
dt.Columns.Add(property.Name, Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType);
}
The System.Author Windows property is a multiple value string. Windows Search returns this value as an array of strings in a DataColumn. (The column's data-type is string[] or String().) When I call the WriteXML method on the resulting data-table, I get the following InvalidOperationException exception.
Is there a way to specify the data-table's xml-serializer to use for specific columns or specific data-types?
Basically, how can I make WriteXML work with this data-table?
System.InvalidOperationException:
Type System.String[] does not
implement IXmlSerializable interface
therefore can not proceed with
serialization.
You could easily copy your DataTable changing the offending Authors column to a String and joing the string[] data with a proper delimiter like "|" or "; ".
DataTable xmlFriendlyTable = oldTable.Clone();
xmlFriendlyTable.Columns["Author"].DataType = typeof(String);
xmlFriendlyTable.Columns["Author"].ColumnMapping = MappingType.Element;
foreach(var row in oldTable.Rows) {
object[] rowData = row.ItemArray;
object[] cpyRowData = new object[rowData.Length];
for(int i = 0; i<rowData.Length; i++) {
if(rowData[i] != null && rowData[i].GetType() == typeof(String[])) {
cpyRowData[i] = String.Join("; ", (rowData[i] as String[]));
} else {
cpyRowData[i] = rowData[i];
}
xmlFriendlyTable.Rows.Add(cpyRowData);
}
}
xmlFriendlyTable.WriteXml( ... );
NOTE Wrote the above in the web browser, so there may be syntax errors.
How can I write code for the below method so that it can be tested in NUnit? How to handle a Hashtable?
public DataSet MySampleMethod(int param1, string param2, Hashtable ht)
{
if(ht==null)
{
ht = new Hashtable();
}
ht.Add("testKey","testData");
DataSet ds = new DataSet();
ds.Tables.Add();
ds.Tables[0].Columns.Add("Column1");
ds.Tables[0].Columns.Add("Column2");
ds.Tables[0].Columns.Add("Column3");
DataRow dr = ds.Tables[0].NewRow();
dr["Column1"] = "My column 1";
dr["Column2"] = "My column 2";
dr["Column3"] = "My column 3";
ds.Tables[0].Rows.Add(dr);
DataRow dr1 = ds.Tables[0].NewRow();
dr1["Column1"] = param1.ToString();
dr1["Column2"] = param2;
dr1["Column3"] = ht["testKey"].ToString();
ds.Tables[0].Rows.Add(dr1);
return ds;
}
First question to ask is: Why do I need to write this method? What's it doing for me?
Give the method a more human-friendly name.
From what I can see, the method takes in an integer, a string and a hashtable. The method is then expected to return a dataset containing a solitary table with 3 columns,
the first row contains values like {"My Column {ColumnNo}"..}
the second row of which contains the [ intParam.ToString(), stringParam, hashtable["testKey"] ]
Testing this method should be trivial,
Test#1:
Arrange : Create known inputs (an int I , string S, a hashtable with some "testData"=> Y)
Act : Call the method and obtain the resulting dataset
Assert : Query the dataset to see if it has the single table with 2 records. Inspect the contents of the records of the table to see if they contain the header row and the row with [I, S, Y].
Test#2:
Similar to above test, except that you pass in null for the hashtable parameter.
That's all I could see based on the snippet you posted.
HTH
Update: Not sure what you mean here by "handle hashtable" or "write test fixture code for hashtable" ? The hashtable is just a parameter to your function.. so I reckon the test would look something like this (Forgive the bad naming and lack of constants... can't name them unless I know what this function is used for in real life)
[Test]
public void Test_NeedsABetterName()
{
int intVal = 101; string stringVal = "MyString"; string expectedHashValue = "expectedValue";
Hashtable ht = new Hashtable();
ht.Add("testKey", expectedHashValue);
Dataset ds = MySampleMethod(intVal, stringVal, ht);
Assert.AreEqual(1, ds.Tables.Count);
Assert.AreEqual(2, ds.Tables[0].Rows.Count);
// check header Row1.. similar to Row2 as shown below
DataRow row2 = ds.Tables[0].Rows[1];
Assert.AreEqual(intVal.ToString(), row2["Column1"]);
Assert.AreEqual(stringVal, row2["Column2"]);
Assert.AreEqual(expectedHashValue, row2["Column3"])
}
I'd recommend getting a good book like Pragmatic Unit Testing in C# with NUnit or one from the list here to speed you up here.