如何在Visual Studio 2010中使用Crystal Reports创建报表
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我是Visual Studio 2010 C＃的新手。我正在创建一个创建报告的应用程序。报告中显示的信息来自mysql服务器。我已经安装了Crystal Reports。但是，我从MySQL获取数据时遇到了一些问题，因为我无法从MySQL中找到数据。报告创建向导中显示的数据不是MySQL中的数据库文件，而是我在C＃中创建的表单。请帮忙。
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答案
Here I找到了适合你问题的解决方案。
Crystal Reports可以使用ODBC DSN连接到数据库，您可以从中提取数据和信息以进行报告。
注意某些版本的Crystal Reports存在一个已知问题，即应用程序无法通过ODBC连接打开和浏览表和字段。在将Crystal Reports与MySQL一起使用之前，请确保您已更新到最新版本，包括任何未完成的Service Pack和修补程序。有关此问题的详细信息，请参阅“业务”对象知识库以获取更多信息。
跟着这些步骤：
- 使用数据源（ODBC）工具创建DSN。您可以指定完整的数据库，包括用户名和密码，也可以构建基本DSN并使用Crystal Reports设置用户名和密码。
- 通过单击“起始页”上的选项启动“交叉表”报告向导。展开“创建新连接”文件夹，然后展开“ODBC（RDO）”文件夹以获取ODBC数据源列表。
另一答案
DataTable dataTable = new DataTable();
int count1,count2;
clsInfor.northCON.Open();
clsInfor.dataAdapter = new SqlDataAdapter("SELECT Discontinued, QuantityPerUnit FROM Products", clsInfor.northCON);
dataTable = new DataTable();
clsInfor.dataAdapter.Fill(dataTable);
Excel.Application app = new Excel.Application(); //creating a new application
app.Visible = true;
Excel.Workbook book = app.Workbooks.Add(1); // creating an instance of the workbook
Excel.Worksheet sheet = (Excel.Worksheet)book.Worksheets[1]; // creating an instance of the worksheet
((Excel.Range)sheet.Cells[1, "A"]).Value2 = "Report"; // creating the header of the report
((Excel.Range)sheet.Cells[2, "B"]).Value2 = "Number of products per Cat";//creating the names of the colomns in the excell spreedsheet
((Excel.Range)sheet.Cells[2, "C"]).Value2 = "Number of products that have been discontinued";
((Excel.Range)sheet.Cells[4, "D"]).Value2 = "Tot number of Prod";
for (count1 = 0; count1 < dataTable.Rows.Count; count1++)
{
for (count2 = 0; count2 < dataTable.Columns.Count; count2++)
{
sheet.Cells[count1 + 3, count2 + 2] = dataTable.Rows[count1][count2];
}
sheet.Cells.Columns.AutoFit();
}
另一答案
private void btndlt_Click(object sender, EventArgs e)
{
DataGridViewRow row = dataGridView1.Rows[0];
string id = row.Cells[0].Value.ToString();
string path = @"";
XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNode node = doc.SelectSingleNode("/TheToDoList/item[todoID='" + id + "']");
node.ParentNode.RemoveChild(node);
doc.Save(path);
MessageBox.Show("Selected Record Deleted Successfully");
}
private void btnUpdate_Click(object sender, EventArgs e)
{
DataGridViewRow row = dataGridView1.Rows[0];
int id1 = Convert.ToInt32(row.Cells[0].Value);
string path = @"";
XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNode node = doc.SelectSingleNode("/TheToDoList/item[todoID='" + id1 + "']");
node.ParentNode.RemoveChild(node);
doc.Save(path);
// //Load the XML File
doc.Load(path);
XmlElement root = doc.CreateElement("TheToDoList");
XmlElement Subroot = doc.CreateElement("item");
XmlElement todoID = doc.CreateElement("todoID");
XmlElement todoDate = doc.CreateElement("todoDate");
XmlElement todoTime = doc.CreateElement("todoTime");
XmlElement todoItem = doc.CreateElement("todoItem");
XmlElement todoStatus = doc.CreateElement("todoStatus");
XmlElement UserID = doc.CreateElement("UserID");
//Add the values for each nodes
todoID.InnerText = row.Cells[0].ToString();
todoDate.InnerText = row.Cells[1].ToString();
todoTime.InnerText = row.Cells[2].ToString();
todoItem.InnerText = row.Cells[3].ToString();
todoStatus.InnerText = row.Cells[4].ToString();
UserID.InnerText = row.Cells[5].ToString();
//Construct the document
doc.AppendChild(root);
root.AppendChild(Subroot);
Subroot.AppendChild(todoID);
Subroot.AppendChild(todoDate);
Subroot.AppendChild(todoTime);
Subroot.AppendChild(todoItem);
Subroot.AppendChild(todoStatus);
Subroot.AppendChild(UserID);
doc.Save(path);
MessageBox.Show("Selected Record Edited Successfully");
另一答案
XmlDocument xmlDocument = new XmlDocument();
string xmlFileName = (@"C:");
xmlDocument.Load(xmlFileName);
XmlElement xItem = xmlDocument.CreateElement("item");
XmlElement xmlSubElement1 = xmlDocument.CreateElement("todoID");
xmlSubElement1.InnerText = todoID;
xItem.AppendChild(xmlSubElement1);
XmlElement xmlSubElement2 = xmlDocument.CreateElement("todoDate");
xmlSubElement2.InnerText = todoDate;
xItem.AppendChild(xmlSubElement2);
XmlElement xmlSubElement3 = xmlDocument.CreateElement("todoTime");
xmlSubElement3.InnerText = todoTime;
xItem.AppendChild(xmlSubElement3);
XmlElement xmlSubElement4 = xmlDocument.CreateElement("todoItem");
xmlSubElement4.InnerText = todoItem;
xItem.AppendChild(xmlSubElement4);
XmlElement xmlSubElement5 = xmlDocument.CreateElement("todoStatus");
xmlSubElement5.InnerText = todoStatus;
xItem.AppendChild(xmlSubElement5);
XmlElement xmlSubElement6 = xmlDocument.CreateElement("UserID");
xmlSubElement6.InnerText = UserID;
xItem.AppendChild(xmlSubElement6);
//xmlDocument.AppendChild(xItem);
xmlDocument.DocumentElement.LastChild.AppendChild(xItem);
// then finally save
xmlDocument.Save(@"C:");
xmlmsg ="A new item has been added to the to do list";
另一答案
DataAccess.Connection.Close();
DataAccess.Connection.Open();
DataAccess.dataAdapter = new SqlDataAdapter(" SELECT sales.qty, sales.ord_date, sales.payterms, stores.stor_name, stores.stor_id, titles.title_id, titles.title, titles.price, (sales.qty * titles.price) AS Total FROM sales INNER JOIN stores ON sales.stor_id = stores.stor_id INNER JOIN titles ON sales.title_id = titles.title_id", DataAccess.Connection);
DataAccess.dataTable = new DataTable();
DataAccess.dataAdapter.Fill(DataAccess.dataTable);
Bind.DataSource = DataAccess.dataTable;
string temp = DataAccess.dataTable.Rows[0][3].ToString();
Excel.Application xlApp2 = new Excel.Application();
xlApp2.Visible = true;
Excel.Workbook Workbook2 = xlApp2.Workbooks.Add(1);
Excel.Worksheet Worksheet2 = (Excel.Worksheet)Workbook2.Sheets[1];
Worksheet2.Cells[1, 1] = "Sales Report";
Worksheet2.Cells[3, 1] = temp.ToUpper();
Worksheet2.Cells[4, 2] = "Order Date";
Worksheet2.Cells[4, 3] = "Payment Terms";
Worksheet2.Cells[4, 4] = "Store Name";
Worksheet2.Cells[4, 5] = "Store ID";
Worksheet2.Cells[4, 6] = "Title ID";
Worksheet2.Cells[4, 7] = "Book Title";
Worksheet2.Cells[4, 8] = "Unit Price";
Worksheet2.Cells[4, 9] = "Total Price";
int intCount2 = 5;
int TotalRec = 0;
int finecort = 0;
decimal cost = 0;
decimal cost1 = 0;
for (int n = 0; n < DataAccess.dataTable.Rows.Count; n++)
{
if (DataAccess.dataTable.Rows[n][3].ToString().Equals(temp))
{
Worksheet2.Cells[intCount2, "C"] = DataAccess.dataTable.Rows[n][0];
Worksheet2.Cells[intCount2, "B"] = DataAccess.dataTable.Rows[n][1];
Worksheet2.Cells[intCount2, "D"] = DataAccess.dataTable.Rows[n][3];
Worksheet2.Cells[intCount2, "E"] = DataAccess.dataTable.Rows[n][4];
Worksheet2.Ce以上是关于如何在Visual Studio 2010中使用Crystal Reports创建报表的主要内容，如果未能解决你的问题，请参考以下文章
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