I´m starting to develop in C# and SQL Server, I don´t know how to extract information from one excel specific colum.
I have this code working, but what i need it´s to compare a textbox with a specific column and get the data:
Example
Select *
From T_Empleado
Where "Specific column" = "textbox".
public void mostrarExcel()
{
String name = "Sheet1";
String constr = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" + "C:\\Users\\alegriad\\Desktop\\sample\\Book2.xlsx" + "; Extended Properties='Excel 12.0 XML;HDR=YES;';";
OleDbConnection con = new OleDbConnection(constr);
OleDbCommand oconn = new OleDbCommand("Select * From [" + name + "$]'", con);
con.Open();
OleDbDataAdapter sda = new OleDbDataAdapter(oconn);
DataTable data = new DataTable();
sda.Fill(data);
dgv_Reporte.DataSource = data;
}//mostrarExcel
Thank you.
You can write your query like this
OleDbCommand oconn = new OleDbCommand("Select * From [" + name + "$] where columnName = '"+ YourTextboxValue+ "'" , con);
I try with sample excel like below
And my query like this
OleDbCommand oconn = new OleDbCommand("Select * From [" + name + "$] WHERE Name = 'T1'", con);
This works for me.
Related
I have a gridview and it is taking the data from an excel sheet. In visual studio, from the properties menu of the gridview I have just set paging and sorting enabled. But this is not working. Is it about the excel source or should I add some extra code ?
string whereClause = SearchTextBox.Text;
String name = "Sheet0";
String constr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
"C:\\Users\\BerkayS\\Desktop\\VSCLOGN.xls" +
";Extended Properties='Excel 12.0 XML;HDR=YES;';";
OleDbConnection con = new OleDbConnection(constr);
OleDbCommand oconn = new OleDbCommand("Select " + selectedCriteria + " From [" + name + "$] where USER_ID = '" + whereClause + "'", con);
con.Open();
OleDbDataAdapter sda = new OleDbDataAdapter(oconn);
DataTable data = new DataTable();
sda.Fill(data);
GridView2.DataSource = data;
GridView2.DataBind();
GridView2.Visible = true;
Note: Ignore some variable names in the code, they are assigned before
I am trying to get a string from a MS Access database and insert into a SQL Server database by using a dataset. But the utf8 string in my SQL statement inserted like ????????? - what can I about this?
This is my code:
OleDbCommand cmd2 = new OleDbCommand("select * from t_about_us", con_access);
OleDbDataAdapter da2 = new OleDbDataAdapter(cmd2);
DataSet ds2 = new DataSet();
da2.Fill(ds2, "t_about_us");
con.Open();
string command2 = "insert into t_about_us(matn,see,metatag_description,metatag_keywords,metatag_author) values('" +
Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(ds2.Tables[0].Rows[0]["matn"].ToString())) + "','" +
Convert.ToInt32(ds2.Tables[0].Rows[0]["see"].ToString()) + "','" +
ds2.Tables[0].Rows[0]["metatag_description"].ToString() + "','" +
ds2.Tables[0].Rows[0]["metatag_keywords"].ToString() + "','" +
ds2.Tables[0].Rows[0]["metatag_author"].ToString() + "')";
SqlCommand cmdd2 = new SqlCommand(command2, con);
cmdd2.ExecuteNonQuery();
con.Close();
By using dynamic SQL to construct an SQL statement with sting literals like 'this' you are implicitly converting the string from Unicode into the single-byte character set used by the SQL Server, and any Unicode characters that do not map to that target character set will be replaced by question marks.
So, for example, with my SQL Server ...
cmd.CommandText = "INSERT INTO myTable (textCol) VALUES ('γιορτή')";
cmd.ExecuteNonQuery();
... will be inserted as ...
????t?
... even though [textCol] is defined as an NVARCHAR column.
The correct approach is to use a parameterized query, like so
cmd.CommandText = "INSERT INTO myTable (textCol) VALUES (#word)";
cmd.Parameters.Add("#word", System.Data.SqlDbType.NVarChar).Value = "γιορτή";
cmd.ExecuteNonQuery();
thank you my friends Finally my code work, this is answer:
OleDbCommand cmd2 = new OleDbCommand("select * from t_about_us", con_access);
OleDbDataAdapter da2 = new OleDbDataAdapter(cmd2);
DataSet ds2 = new DataSet();
da2.Fill(ds2, "t_about_us");
con.Open();
SqlCommand cmd1 = new SqlCommand("INSERT INTO t_about_us(matn,see,metatag_description,metatag_keywords,metatag_author) VALUES (#matn,#see,#metatag_description,#metatag_keywords,#metatag_author)",con);
cmd1.Parameters.Add("#see", System.Data.SqlDbType.BigInt).Value = Convert.ToInt32(ds2.Tables[0].Rows[0]["see"].ToString());
cmd1.Parameters.Add("#matn", System.Data.SqlDbType.NVarChar).Value = ds2.Tables[0].Rows[0]["matn"].ToString();
cmd1.Parameters.Add("#metatag_description", System.Data.SqlDbType.NVarChar).Value = ds2.Tables[0].Rows[0]["metatag_description"].ToString();
cmd1.Parameters.Add("#metatag_keywords", System.Data.SqlDbType.NVarChar).Value = ds2.Tables[0].Rows[0]["metatag_keywords"].ToString();
cmd1.Parameters.Add("#metatag_author", System.Data.SqlDbType.NVarChar).Value = ds2.Tables[0].Rows[0]["metatag_author"].ToString();
cmd1.ExecuteNonQuery();
con.Close();
This is how i am import my Excel file:
stirng file = "c:\myFile.xlsx";
DataGridView dgvIM;
private void Import()
{
String name = "Items";
String constr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
file +
";Extended Properties='Excel 8.0;HDR=YES;';";
OleDbConnection con = new OleDbConnection(constr);
OleDbCommand oconn = new OleDbCommand("Select * From [" + name + "$]", con);
con.Open();
OleDbDataAdapter sda = new OleDbDataAdapter(oconn);
System.Data.DataTable data = new System.Data.DataTable();
sda.Fill(data);
dgvIM.DataSource = data;
}
What i want to do is import my Excel file but with specific condition, my second column contain several groups of strings ("First", "Second" etc..) and i want to add only the column with name "First" and not the whole list.
How can i do that ?
Just use a where condition on the sql command like this
string cmdText = "Select * From [" + name + "$] WHERE secondColumnName = 'First'";
using(OleDbConnection con = new OleDbConnection(constr))
using(OleDbCommand oconn = new OleDbCommand(cmdText con))
{
con.Open();
OleDbDataAdapter sda = new OleDbDataAdapter(oconn);
System.Data.DataTable data = new System.Data.DataTable();
sda.Fill(data);
dgvIM.DataSource = data;
}
Note that in your connectionstring you specify HDR=YES, this means that the first non blank line of your excel sheet contains headers that are interpreted as column names. You should update your query setting the correct column name in the WHERE condition
EDIT In response at your comments below, if you want to retrieve every row where AGE is 12 the query becomes
string cmdText = "Select * From [" + name + "$] WHERE Age = 12";
I am trying to bind excel file to dataGridView
strConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
+ "Data Source=E://Org.xls;"
+ "Extended Properties=" + (char)34
+ "Excel 8.0;HDR=Yes;" + (char)34;
OleDbConnection conn = new OleDbConnection(strConn);
textBox1.Text = "test";
OleDbCommand command = new OleDbCommand("Select * from [Sheet1$]", conn);
conn.Open();
dataGridView1.DataSource = command.ExecuteReader();
conn.Close();
But grid view doesn't show anything. It doesn't give error either
Heres how to do it, just need to change the path for the excel file and the reference to the grid.
OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c://Org.xls;Extended Properties=" + (char)34 + "Excel 8.0;HDR=Yes;" + (char)34);
DataSet myExcelData=new DataSet();
conn.Open();
OleDbDataAdapter myDataAdapter = new OleDbDataAdapter("Select * from [Sheet1$]", conn);
myDataAdapter.Fill(myExcelData);
ultraGrid1.DataSource = myExcelData;
conn.Close();
Change that code
ultraGrid1.DataSource = myExcelData;
to this
dataGridView1.DataSource = myExcelData.Tables[0];
How to filter data in datagrid for example if you select the combo box in student number then input 1001 in the text field. All records in 1001 will appear in datagrid. I am using sql server
private void button2_Click(object sender, EventArgs e)
{
if (cbofilter.SelectedIndex == 0)
{
string sql;
SqlConnection conn = new SqlConnection();
conn.ConnectionString = "Server= " + Environment.MachineName.ToString() + #"\; Initial Catalog=TEST;Integrated Security = true";
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds1 = new DataSet();
ds1 = DBConn.getStudentDetails("sp_RetrieveSTUDNO");
sql = "Select * from Test where STUDNO like '" + txtvalue.Text + "'";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.CommandType = CommandType.Text;
da.SelectCommand = cmd;
da.Fill(ds1);
dbgStudentDetails.DataSource = ds1;
dbgStudentDetails.DataMember = ds1.Tables[0].TableName;
dbgStudentDetails.Refresh();
}
else if (cbofilter.SelectedIndex == 1)
{
//string sql;
//SqlConnection conn = new SqlConnection();
//conn.ConnectionString = "Server= " + Environment.MachineName.ToString() + #"\; Initial Catalog=TEST;Integrated Security = true";
//SqlDataAdapter da = new SqlDataAdapter();
//DataSet ds1 = new DataSet();
//ds1 = DBConn.getStudentDetails("sp_RetrieveSTUDNO");
//sql = "Select * from Test where Name like '" + txtvalue.Text + "'";
//SqlCommand cmd = new SqlCommand(sql,conn);
//cmd.CommandType = CommandType.Text;
//da.SelectCommand = cmd;
//da.Fill(ds1);
// dbgStudentDetails.DataSource = ds1;
//dbgStudentDetails.DataMember = ds1.Tables[0].TableName;
//ds.Tables[0].DefaultView.RowFilter = "Studno = + txtvalue.text + ";
dbgStudentDetails.DataSource = ds.Tables[0];
dbgStudentDetails.Refresh();
}
}
It's difficult to answer pricisely to a vague question. I guess that you'll have to adapt your SQL query with a WHERE statement containing the user input.
If 'student number' is selected in the combo box, query like this (numbers starting with):
SELECT id, name, number FROM students WHERE number LIKE #search + '%'
If 'student name' is selected, use another query (names containing):
SELECT id, name, number FROM students WHERE name LIKE '%' + #search + '%'
Please explain in what sense C# is concerned.
You don't say what is wrong with the code you commented out. You also don't say what type the Studno column is.
Have you tried something like:
ds1.Tables[0].DefaultView.RowFilter = "Studno = '" + txtvalue.text + "'";