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Showing posts with label Database. Show all posts
Showing posts with label Database. Show all posts

Code to export the Grid View/Data Grid data into Excel File.

| Friday, February 13, 2015
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 protected void btnExportToExcel_Click(object sender, EventArgs e)  
   {  
     try  
     {  
       DataTable dt = student.GetDetails("B.Tech").Tables[0];  
       DataGrid GridView1 = new DataGrid();  
       GridView1.DataSource = dt;  
       GridView1.DataBind();  
       Response.Clear();  
       Response.Buffer = true;  
       Response.AddHeader("content-disposition", string.Format("attachment; filename=StudentsBTech.xls"));  
       Response.Charset = "";  
       Response.ContentType = "application/vnd.ms-excel";  
       StringWriter sw = new StringWriter();  
       HtmlTextWriter htw = new HtmlTextWriter(sw);  
       GridView1.GridLines = GridLines.Both;  
       GridView1.AllowPaging = false;  
       GridView1.RenderControl(htw);  
       Response.Output.Write(sw.ToString());  
       GridView1.DataBind();  
       Response.Flush();  
     }  
     catch (Exception ex)  
     {  
     }  
     finally { Response.End(); }  
   }  
   public override void VerifyRenderingInServerForm(Control control)  
   { }  

Code to export the Grid View/Data Grid data into Excel File.

Posted by : Stranger
Date :Friday, February 13, 2015
With 0comments

Could not add reference to "System.Net.Http.Formatting" namespace in WPF web api client project

| Friday, December 12, 2014
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For adding the reference in your web api client

1. Right click on "References" in the solution.
2. Following window will open.


3. Select location "Extension" as shown above and check "System.Net.Http.Formatting" namespace
4. and DONE!!!

Convert DataSet or DataTable into JSON in C#

| Tuesday, June 10, 2014
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 public string ConvertToJSON(DataSet ds)  
 {  
 System.Web.Script.Serialization.JavaScriptSerializer serializer = 
new System.Web.Script.Serialization.JavaScriptSerializer();  
     List<Dictionary<string, object>> rows = 

new List<Dictionary<string, object>>();  
     Dictionary<string, object> row = null;  
     foreach (DataRow dr in ds.Tables[0].Rows)  
     {  
       row = new Dictionary<string, object>();  
       foreach (DataColumn col in ds.Tables[0].Columns)  
       {  
         row.Add(col.ColumnName.Trim(), dr[col]);  
       }  
       rows.Add(row);  
     }  
     return serializer.Serialize(rows);  
 }  

Convert DataSet or DataTable into JSON in C#

Posted by : Stranger
Date :Tuesday, June 10, 2014
With 0comments

Update the .edmx file when the database changes

| Saturday, May 17, 2014
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To update the .edmx file when the database changes

  1. In the Model Browser, right-click the .edmx file and select Update Model from Database.
  2. The Update Model Wizard starts. If there is no database connection specified, the Choose Your Database Connection dialog box appears. Otherwise, the Choose Your Database Objects dialog box appears. 
  3. If the Choose Your Database Connection dialog box appears, specify a database connection. Otherwise, go to the next step.
  4. For details about specifying a connection, see Choose Your Data Connection Dialog Box (Entity Data Model Wizard). When you have specified the connection, click Next to display the Choose Your Database Objects dialog box.
  5. Click the Add tab.
    Nodes for tables, views, and stored procedures are displayed. If any objects have been added to the database (or were not included in the previous storage model), you can expand the corresponding node to view the objects that are available to add to the conceptual model.
  6.  If an object has been deleted from the conceptual model but has not also been deleted from the storage model, the object will not be available to add to the conceptual model.
  7. Expand the Tables, Views, and Stored Procedures nodes, and check the objects you want to add to the .edmx file.
  8. Click the Refresh tab.
    Nodes for tables, views, and stored procedures that are included in the existing storage model are displayed. Any changes that have been made to these database objects will be reflected in the updated storage model. Changes to the conceptual model are made when columns are added to a table or view.
  9. Click the Delete tab.
    Nodes for tables, views, and stored procedures are displayed. If an object has been deleted from the database and was included in the previous storage model, you can expand the corresponding node. The objects in these nodes will be deleted from the updated model.
    Click Finish to update the .edmx file with the database changes.

Reference - MSDN

Update the .edmx file when the database changes

Posted by : Stranger
Date :Saturday, May 17, 2014
With 0comments

How to apply RowFilter on DataView

| Friday, May 9, 2014
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Following code can be used to apply filter on the DataView

 DataSet ds = new DataSet();  
 ds= GetData();  
 DataView dv = ds.Tables[0].DefaultView;  
 dv.RowFilter = "SrNo='" + txtSNo.Text.Trim() + "'";   


LIKE, AND , OR operators can also be used in the RowFilter of Dataview.

To access the filtered records, each DataRowView of the DataView

 foreach (DataRowView drv in dv)  
       {  
         currentName = Convert.ToString(drv["Name"]);  
       }  



How to apply RowFilter on DataView

Posted by : Stranger
Date :Friday, May 9, 2014
With 0comments

Unable to find the requested .Net Framework Data Provider. It may not be installed.

| Thursday, April 10, 2014
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Above error can be caused by if the "Provider" given in "SqlDataSource" or any other data source control is not updated.

This error can be resolved either by updating the Provider details in connection string property of web.config file or you simply remove the

 ProviderName="<%$ ConnectionStrings:DbConnectionString.ProviderName %>"  


from SqlDataSource control or any other data source control.

SQL Server Update statement with Joins and Where clause

| Thursday, February 27, 2014
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Update statement of MS SQL server is used to update the tuples or set of tuples in a table. Update statement can also be used with joins to update the values from one table into another table as follows.
UPDATE  Customer
SET BrandName= BrandNameMaster.Id
from Customer Inner Join BrandNameMaster on
BrandName=BrandNameMaster.Name




This will update the "BrandName" column of the "Customer" table with the values of "Id" columns from the "BrandNameMaster" table based on the Inner join condition on columns "BrandName" of "Customer" table and "Name" column of "BrandNameMaster" table.

We can also additionally use where statement with such Update statement as follows.

UPDATE  Customer
SET BrandName= BrandNameMaster.Id
from Customer Inner Join BrandNameMaster on
BrandName=BrandNameMaster.Name

where  BrandName='Nike'










 If you have used any other variations of update statement, Please post in the comments.

Thanks 

SQL Server Update statement with Joins and Where clause

Posted by : Stranger
Date :Thursday, February 27, 2014
With 0comments
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