How to Change Output File in T4 Template?

Question

Here is my Code and it's working fine but its create .cs file under Enums.tt and the file name is Enums.generated.cs but I want to create an output file at my specific location in the project how can I achieve this?

Let me know is there any way to do this stuff. I searched for this but I didn't find any proper solution.

<#@ template debug="true" hostSpecific="false" #>
<#@ output extension=".generated.cs" #>
<#@ Assembly Name="System.Data" #>
<#@ import namespace="System.Data" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.IO" #>
<#@ import namespace="System.Text.RegularExpressions" #>

<#
    string tableName = "ContentTypeMaster";
    string columnId = "Id";
    string columnName = "Name";
    string connectionString = "Data Source=192.168.120.71;Initial Catalog=ErisWebsite;Persist Security Info=True;User ID=IM;Password=Intellimedia$#12;MultipleActiveResultSets=True;Connection Timeout=5000";
#>
using System;
using System.CodeDom.Compiler;

namespace ER.ErisCampaign.Enums
{
    /// <summary>
    /// <#= tableName #> auto generated enumeration
    /// </summary>
    public enum <#= tableName #>
    {
<#
    SqlConnection conn = new SqlConnection(connectionString);
    string command = string.Format("select {0}, {1} from {2} order by {0}", columnId, columnName, tableName);
    SqlCommand comm = new SqlCommand(command, conn);

    conn.Open();

    SqlDataReader reader = comm.ExecuteReader();
    bool loop = reader.Read();

    while(loop)
    {
#>      /// <summary>
        /// <#= reader[columnName] #> configuration setting.
        /// </summary>
        <#= Pascalize(reader[columnName]) #> = <#= reader[columnId] #><# loop = reader.Read(); #><#= loop ? ",\r\n" : string.Empty #>
<#
    }
#>  }
}
<#+
    private string Pascalize(object value)
    {
        Regex rx = new Regex(@"(?:[^a-zA-Z0-9]*)(?<first>[a-zA-Z0-9])(?<reminder>[a-zA-Z0-9]*)(?:[^a-zA-Z0-9]*)");
        return rx.Replace(value.ToString(), m => m.Groups["first"].ToString().ToUpper() + m.Groups["reminder"].ToString().ToLower());
    }


#>

Possible duplicate of [Custom Output File Path For T4 Template](https://stackoverflow.com/questions/21352411/custom-output-file-path-for-t4-template) — Sinatr, May 10 '19 at 06:58

Tim Maes · Accepted Answer · 2019-05-10T09:33:13.117

Add following method to the T4 template:

<#
public void SaveFile(string folder, string fileName, string content)
{
    using (FileStream fs = new FileStream(Path.Combine(folder, fileName), FileMode.Create))
    {  
        using (StreamWriter str = new StreamWriter(fs))
        {
        str.WriteLine(content);
        str.Flush();
        }
    }
}
#>

Add following lines at the end of your output (last <# control block #>) to prevent writing to child node and write to custom directory/file:

<#
SaveFile(folder, filename + ".cs", this.GenerationEnvironment.ToString());
this.GenerationEnvironment.Remove(0, this.GenerationEnvironment.Length);
#>

This project holds some examples.

Please note that it will still add a empty child node, but no output is written inside the file.

How to Change Output File in T4 Template?

1 Answers1