Develop Reference

C# & SQL Server : searching all database columns and populating datagrid

I am writing a a C# application, and I am stuck at searching the database and populating a data grid view. However I want to use this with command builder.
The issue is, I need the search to work across all columns in the database. I thought using OR and LIKE statements would do this. But instead I get either invalid syntax or no column name exists in the search.
Does anyone know a solution?
My current .cs:
private void btnSearchJob_Click(object sender, EventArgs e)
{
try
{
SqlConnection con = new SqlConnection();
con.ConnectionString = (#"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=MTR_Database;Integrated Security=True");
string selectQuery = "SELECT * FROM dbo.[" + cmbJobName.Text + "] WHERE ([Job Name] LIKE " +txtSearchJob.Text+ " OR [Manufacturer] LIKE " +txtSearchJob.Text+ ")";
// DataAdapter
myDA = new SqlDataAdapter(selectQuery, con);
// SqlCommand
SqlCommand myCMD = new SqlCommand(selectQuery, con);
// DataAdapter to Command
myDA.SelectCommand = myCMD;
// Define Datatable
myDT = new DataTable();
// Command Builder (IS GOD!)
SqlCommandBuilder cb = new SqlCommandBuilder(myDA);
// Teach Command builder to be a boss!
myDA.UpdateCommand = cb.GetUpdateCommand();
myDA.InsertCommand = cb.GetInsertCommand();
myDA.DeleteCommand = cb.GetDeleteCommand();
// Fill the DataTable with DataAdapter information
myDA.Fill(myDT);
// Fill DataTable with Database Schema
myDA.FillSchema(myDT, SchemaType.Source);
// Bind The Data Table to the DataGrid
dataGridView1.DataSource = myDT;
// AutoSize Datagrid Rows and Colums to fit the Datagrid
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
}
// Catch Exception
catch (Exception ex)
{
MessageBox.Show(this, ex.Message, "SQL ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
NOTE:
I am aware of using parameters, I am simply using this to see if it will work when I will add parameters later.

this is what I use to get everything back into a DataTable
//'places the call to the system and returns the data as a datatable
public DataTable GetDataAsDatatable(List<SqlParameter> sqlParameters, string connStr, string storedProcName)
{
var dt = new DataTable();
var sqlCmd = new SqlCommand();
using (var sqlconn = new SqlConnection(connStr))
{
sqlCmd.Connection = sqlconn;
sqlCmd.CommandType = CommandType.StoredProcedure;
sqlCmd.CommandText = storedProcName;
sqlCmd.CommandTimeout = 5000;
foreach (var sqlParam in sqlParameters)
{
sqlCmd.Parameters.Add(sqlParam);
}
using (var sqlDa = new SqlDataAdapter(sqlCmd))
{
sqlDa.Fill(dt);
}
}
sqlParameters.Clear();
return dt;
}
//'places the call to the system and returns the data as a datatable
public DataTable GetDataAsDatatable(string connStr, string query)
{
var dt = new DataTable();
var sqlCmd = new SqlCommand();
using (var sqlconn = new SqlConnection(connStr))
{
sqlCmd.Connection = sqlconn;
sqlCmd.CommandType = CommandType.Text;
sqlCmd.CommandText = query;
sqlCmd.CommandTimeout = 5000;
using (var sqlDa = new SqlDataAdapter(sqlCmd))
{
sqlDa.Fill(dt);
}
}
return dt;
}
hopefully this is pretty self explanatory to you, however pass in a list of SQL Parameters, connection string, and the stored procedure name, or use the second one where you pass in the inline SQL and the connection string.

I think you are missing ' in the query. Try this...
string selectQuery = "SELECT * FROM dbo.[" + cmbJobName.Text + "] WHERE ([Job Name] LIKE '" +txtSearchJob.Text+ "' OR [Manufacturer] LIKE '" +txtSearchJob.Text+ "')";

exporting data set to excelsheet

I am new to excel automation in C# so I am confused about this. I have imported an excel in a dataset and I have done some updates in the dataset as per my requirement. now I want to export that dataset to that input sheet so that I can see the updates done in the dataset reflected in the datasheet. what will be the best approach for exporting dataset to excel.
below is the code of how I am opening the excel sheet:
string sConnection = null;
OleDbConnection oleExcelConnection = default(OleDbConnection);
sConnection = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=c:\input.xls;Extended Properties=\"Excel 12.0;HDR=No;IMEX=1\"";
oleExcelConnection = new OleDbConnection(sConnection);
oleExcelConnection.Open();
string sqlquery = "Select * From [c:\input.xls]";
DataSet ds = new DataSet();
OleDbDataAdapter da = new OleDbDataAdapter(sqlquery, oleExcelConnection);
da.Fill(ds);
System.Data.DataTable dt = ds.Tables[0];
/* 10 to 12 linq queries on dt*/
-> now here I want to export the updated dt to input.xls

after research of many hours, I found a way to write an excel using datatable. Although, my original requirement was to update the original sheet, I guess I will have to be happy with creating a new output sheet from scratch. the solution is given below:
//open file
StreamWriter wr = new StreamWriter(#"D:\\Book1.xls");
// dt is the DataTable needed to be dumped in an excel sheet.
try
{
for (int i = 0; i < dt.Columns.Count; i++)
{
wr.Write(dt.Columns[i].ToString().ToUpper() + "\t");
}
wr.WriteLine();
//write rows to excel file
for (int i = 0; i < (dt.Rows.Count); i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
if (dt.Rows[i][j] != null)
{
wr.Write(Convert.ToString(dt.Rows[i][j]) + "\t");
}
else
{
wr.Write("\t");
}
}
//go to next line
wr.WriteLine();
}
//close file
wr.Close();
}
catch (Exception ex)
{
throw ex;
}

http://www.codeproject.com/Tips/705470/Read-and-Write-Excel-Documents-Using-OLEDB
private void WriteExcelFile()
{
string connectionString = GetConnectionString();
using (OleDbConnection conn = new OleDbConnection(connectionString))
{
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
cmd.CommandText = "CREATE TABLE [table1] (id INT, name VARCHAR, datecol DATE );";
cmd.ExecuteNonQuery();
cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(1,'AAAA','2014-01-01');";
cmd.ExecuteNonQuery();
cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(2, 'BBBB','2014-01-03');";
cmd.ExecuteNonQuery();
cmd.CommandText = "INSERT INTO [table1](id,name,datecol) VALUES(3, 'CCCC','2014-01-03');";
cmd.ExecuteNonQuery();
cmd.CommandText = "UPDATE [table1] SET name = 'DDDD' WHERE id = 3;";
cmd.ExecuteNonQuery();
conn.Close();
}
}
Google is your friend =)

Using ExecuteReader instead of SQLDataAdapter

I've got a C# project where I'm trying to export the results of a datagrid. Sometimes the data gets quite large, so rather than re-executing the code I want to dump the dataset into a session variable.
This works perfectly in most of my projects. One example from a project where I use this is:
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection sqlconnectionStatus = new SqlConnection(str);
string DDL_Value = Convert.ToString(Request.QueryString["DDL_Val"]);
//Use the ClassTesting class to determine if the dates are real, and fill in today's date if they're blank
string StDt_Value = ClassTesting.checkFields(Request.Form["txtStartDate"], "Date");
string EnDt_Value = ClassTesting.checkFields(Request.Form["txtEndDate"], "Date");
//string StDt_Value = Convert.ToString(Request.QueryString["StDt_Val"]);
//string EnDt_Value = Convert.ToString(Request.QueryString["EnDt_Val"]);
string BTN_Value;
// Because the date is stored as an INT, you have to request the string and then
// convert it to an INT
string StDT_Vals = Request.QueryString["StDt_Val"].ToString();
string EnDT_Vals = Request.QueryString["EnDt_Val"].ToString();
//sqlquery = "Select PROC_NM as 'Agent Name', AdminLevel as Role, Count(Claim_ID) as 'Count of Claims Reviewed', Spare as AgentID ";
//sqlquery = sqlquery + "from ClosedClaims_MERGE CCM ";
sqlquery = "Select PROC_NM as 'Agent Name', AdminLevel as Role, Count(DISTINCT Claim_ID) as 'Count of Claims Reviewed', Spare as AgentID ";
sqlquery = sqlquery + "from (SELECT DISTINCT Spare, SpareFinished, CLAIM_ID FROM ClosedClaims_MERGE ";
sqlquery = sqlquery + "UNION SELECT DISTINCT Spare, SpareFinished, CLAIM_ID FROM tblAuditing) CCM ";
sqlquery = sqlquery + "LEFT JOIN PROC_LIST PL ON CCM.Spare = PL.LOGIN ";
sqlquery = sqlquery + "WHERE CCM.SpareFinished >= '" + StDt_Value + "' AND CCM.SpareFinished <= '" + EnDt_Value + "' ";
sqlquery = sqlquery + "GROUP BY Spare, PROC_NM, AdminLevel ";
sqlquery = sqlquery + "ORDER BY Count(Claim_ID) DESC";
SqlConnection con = new SqlConnection(str);
SqlCommand cmd = new SqlCommand(sqlquery, con);
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
// Fill the DataSet.
DataSet ds = new DataSet();
adapter.Fill(ds, "dsEffVol");
// Add this to a session variable so the datagrid won't get NULLed out on repost
Session["SSEffVol"] = ds;
// Perform the binding.
grdEffVol.Attributes.Add("style", "overflow:auto");
//GridView_WODetails.Attributes.Add("style", "table-layout:fixed");
grdEffVol.AutoGenerateColumns = true;
grdEffVol.DataSource = ds;
grdEffVol.DataBind();
}
I've got a new project where I'm not using SQL strings, but instead I'm pulling data based on SQL Server Stored Procedures. The code block there is:
protected void btnSubmit_OnClick(object sender, EventArgs e)
{
List<ReportData> myReportData = new List<ReportData>();
using (SqlConnection connection1 = new SqlConnection(str2))
{
//Query the Reports table to find the record associated with the selected report
using (SqlCommand cmd = new SqlCommand("SELECT * from RM_tblManagerReports WHERE ReportID = " + cboFilterOption.SelectedValue + "", connection1))
{
connection1.Open();
using (SqlDataReader DT1 = cmd.ExecuteReader())
{
while (DT1.Read())
{
//Read the record into an "array", so you can find the SProc and View names
int MyRptID = Convert.ToInt32(DT1[0]);
string MyRptName = DT1[1].ToString();
string MyRptSproc = DT1[2].ToString();
string MySQLView = DT1[3].ToString();
string MyUseDates = DT1[4].ToString();
//Run the Stored Procedure first
SqlConnection connection2 = new SqlConnection(str2);
SqlCommand cmd2 = new SqlCommand();
cmd2.CommandType = CommandType.StoredProcedure;
cmd2.CommandText = "" + MyRptSproc + "";
cmd2.Connection = connection2;
//Set up the parameters, if they exist
if (MyUseDates != "N")
{
cmd2.Parameters.Add("#StDate", SqlDbType.Date).Value = DateTime.Parse(txtStDate.Value);
cmd2.Parameters.Add("#EnDate", SqlDbType.Date).Value = DateTime.Parse(txtEnDate.Value);
}
else
{
}
try
{
connection2.Open();
GridView_Reports.EmptyDataText = "No Records Found";
SqlDataReader dr = cmd2.ExecuteReader(CommandBehavior.CloseConnection);
Session["SSRptMenu"] = dr;
GridView_Reports.DataSource = dr;
GridView_Reports.DataBind();
// Add this to a session variable so the datagrid won't get NULLed out on repost
GridView_Reports.DataBound += GridView_Reports_RowDataBound;
}
catch (Exception ex)
{
ScriptManager.RegisterStartupScript(btnSubmit, typeof(Button), "Report Menu", "alert('There is no View associated with this report.\\nPlease contact the developers and let them know of this issue.')", true);
Console.WriteLine(ex);
return;
}
finally
{
connection2.Close();
connection2.Dispose();
}
}
}
}
}
}
I'm kind of guessing my way through this, and I'm not sure if I'm reading the data into a dataset properly. The page is shutting down, and I'm pretty sure the problem is in the lines:
SqlDataReader dr = cmd2.ExecuteReader(CommandBehavior.CloseConnection);
Session["SSRptMenu"] = dr;
GridView_Reports.DataSource = dr;
Quite honestly, I've googled SqlDataReader vs SqlDataAdapter and can't really find anything, but I need to fill the session variable in the second example and also have the datagrid populate properly. So, in essence, I need to put the results of a Stored Procedure into a dataset. Can anyone offer suggestions on what I'm doing wrong?

I'm pretty sure most controls don't accept readers in their DataSource property. Plus the majority of readers are forward-only, so although you're trying to store the reader as a session variable, chances are you would only be able to read it once.
Why do you want to use a reader for this when your post seems to indicate that you know you need to use a DataSet? Why not just use an adapter the way you show in your first post? Adapters work fine with commands that use sprocs.
Instead of:
SqlDataReader dr = cmd2.ExecuteReader(CommandBehavior.CloseConnection);
Session["SSRptMenu"] = dr;
GridView_Reports.DataSource = dr;
Just use:
var adapter = new SqlDataAdapter(cmd2);
var ds = new DataSet();
adapter.Fill(ds, "MyTableName");
Session["SSRptMenu"] = ds;
GridView_Reports.DataSource = ds;

How can i export gridview into MS Access(.mdb) in C#

My question is how can i export gridview into MS Access in C#
for this I am Using the following code:
String accessConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\...\\test.accdb;";
String sqlConnectionString = ConfigurationManager.ConnectionStrings["College"].ConnectionString;
//Make adapters for each table we want to export
SqlDataAdapter adapter1 = new SqlDataAdapter();
// SqlDataAdapter adapter2 = new SqlDataAdapter();
DataTable dtFillGrid = (DataTable)ViewState["FillGrid"];
//Fills the data set with data from the SQL database
// DataSet dataSet = new DataSet();
adapter1.Fill(dtFillGrid);
// adapter2.Fill(dataSet, "Table2");
//Create an empty Access file that we will fill with data from the data set
ADOX.Catalog catalog = new ADOX.Catalog();
catalog.Create(accessConnectionString);
//Create an Access connection and a command that we'll use
OleDbConnection accessConnection = new OleDbConnection(accessConnectionString);
OleDbCommand command = new OleDbCommand();
command.Connection = accessConnection;
command.CommandType = CommandType.Text;
accessConnection.Open();
//This loop creates the structure of the database
foreach (DataTable table in dtFillGrid.Rows)
{
String columnsCommandText = "(";
foreach (DataColumn column in table.Columns)
{
String columnName = column.ColumnName;
String dataTypeName = column.DataType.Name;
String sqlDataTypeName = getSqlDataTypeName(dataTypeName);
columnsCommandText += "[" + columnName + "] " + sqlDataTypeName + ",";
}
columnsCommandText = columnsCommandText.Remove(columnsCommandText.Length - 1);
columnsCommandText += ")";
command.CommandText = "CREATE TABLE " + table.TableName + columnsCommandText;
command.ExecuteNonQuery();
}
//This loop fills the database with all information
foreach (DataTable table in dtFillGrid.Rows)
{
foreach (DataRow row in table.Rows)
{
String commandText = "INSERT INTO " + table.TableName + " VALUES (";
foreach (var item in row.ItemArray)
{
commandText += "'" + item.ToString() + "',";
}
commandText = commandText.Remove(commandText.Length - 1);
commandText += ")";
command.CommandText = commandText;
command.ExecuteNonQuery();
}
}
accessConnection.Close();
but in this code I get an error:
The Type or Namespace name ADOX could not be found

According to accessConnectionString content you should install "Data Connectivity Components" in your machine.
It is available to download at http://www.microsoft.com/en-us/download/details.aspx?id=23734

You need to add a reference for Microsoft ADO Ext. 2.7 for DDL and Security(the version number may be different though) which can be found under the COM section of the references dialog , and then add using ADOX; in your code.

Here I did not export gridview in MS Access but I made a database in MS Access using C# with the help of this code
ADOX.Catalog cat = new ADOX.Catalog();
ADOX.Table table = new ADOX.Table();
//Create the table and it's fields.
table.Name = "Table1";
table.Columns.Append("PartNumber", ADOX.DataTypeEnum.adVarWChar, 6); // text[6]
table.Columns.Append("AnInteger", ADOX.DataTypeEnum.adInteger, 10); // Integer
try
{
cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=d:/m2.accdb;" + "Jet OLEDB:Engine Type=5");
cat.Tables.Append(table);
OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.Oledb.4.0;" + "Data Source=d:/m2.accdb");
conn.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
cmd.CommandText = "INSERT INTO Table1([PartNumber],[AnInteger]) VALUES (#FirstName,#LastName)";
cmd.Parameters.Add("#FirstName", OleDbType.VarChar).Value = "neha";
cmd.Parameters.Add("#LastName", OleDbType.VarChar).Value = 20;
cmd.ExecuteNonQuery();
conn.Close();
}
catch (Exception ex)
{
result = false;
}
cat = null;

Query on two DataTable to find duplicate rows

I have an excel sheet which i am uploading to sqlserver table using sqlbulkcopy, i have applied an index on database table so that duplicate entries are ignored but i also want to display the duplicate entries which were ignored in a grid view.
protected void Button1_Click(object sender, EventArgs e)
{
string strFileType = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower();
string strFileName = FileUpload1.PostedFile.FileName.ToString();
FileUpload1.SaveAs(Server.MapPath("~/Import/" + strFileName + strFileType));
string strNewPath = Server.MapPath("~/Import/" + strFileName + strFileType);
string excelConnectionString = String.Format(#"Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source="+strNewPath +"; Extended Properties=Excel 8.0;");
//string excelConnectionString = String.Format(#"Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\myFolder\\Book1.xls;" + "Extended Properties=Excel 8.0;");
// Create Connection to Excel Workbook
using (OleDbConnection connection = new OleDbConnection(excelConnectionString))
{
connection.Open();
OleDbCommand command = new OleDbCommand("Select ID,Data FROM [Sheet1$]", connection);
OleDbCommand command1 = new OleDbCommand("select count(*) from [Sheet1$]",connection);
//Sql Server Table DataTable
DataTable dt4=new DataTable();
SqlCommand cmd4 = new SqlCommand("select id,data from ExcelTable", con);
try
{
SqlDataAdapter da4 = new SqlDataAdapter(cmd4);
da4.Fill(dt4);//sql table datatable
}
catch { }
//excelsheet datatable
DataTable oltlb = new DataTable();
OleDbCommand olcmd = new OleDbCommand("select id,data from [Sheet1$]", connection);
try
{
OleDbDataAdapter olda = new OleDbDataAdapter(olcmd);
olda.Fill(oltlb); //excel table datatable
}
catch { }
var matched = (from table1 in dt4.AsEnumerable()
join table2 in oltlb.AsEnumerable() on
table1.Field<int>("ID") equals table2.Field<int>("ID")
where table1.Field<string>("Data") == table2.Field<string>("Data")
select table1);
DataTable dthi5 = new DataTable();
dthi5 = matched.CopyToDataTable();
GridView1.DataSource = dthi5;
GridView1.DataBind();
GridView1.DataSource = matched.ToList();
ERROR:
Specified cast is not valid.
table1.Field("ID") equals table2.Field("ID")

It would appear that the ID field in one of your tables is not an int.
Rather than one or both of us guessing, try inspecting the data type of the first column in both tables (oltlb and dt4) to see which has the non-integer data type. It may in fact be both.
Here's the thing: even if the value of a string is a numeric literal, you can't cast a string to an int. You'd have to use Int32.Parse or Convert.ToInt32 to convert. So if one of your tables has a string type for the ID column, you would express it like this:
table1.Field<int>("ID") equals Convert.ToInt32(table2.Field<string>("ID"))
If both of the tables have a string ID field, you could just express it this way:
table1.Field<string>("ID") equals table2.Field<string>("ID")